Health, Nutrition & Diseases

🎯 PYQs — Health & Diseases (High Frequency)

Most Asked Topics:

Vaccine types and platforms (mRNA, Viral Vector, Inactivated, DNA)
Pathogens and their disease vectors (Aedes, Anopheles, Sandfly)
Tuberculosis resistance spectrum and treatments (MDR, XDR, BPaLM)
Antimicrobial Resistance (AMR) and regulatory campaigns
Immunity types (Innate vs Acquired) and Immunoglobulins (Antibodies)

Common Traps:

❌ Covishield is NOT an mRNA vaccine (it is a viral vector vaccine)
❌ Hepatitis B is a DNA virus (not an RNA virus like other Hepatitis viruses)
❌ Malaria is caused by a protozoan parasite (Plasmodium), NOT bacteria
❌ O+ is NOT the universal donor (O- is, because it lacks A, B, and Rh antigens)

1. Pathobiology & Vector-Borne Diseases

Guide to Human Pathogens


Classify and compare Prions, Viruses, Bacteria, Protozoa, and Fungi with examples.	Pathogen Database: - Prions: Misfolded proteins containing no nucleic acids (DNA/RNA). Cause neurodegenerative diseases. Examples: Mad Cow Disease, Creutzfeldt-Jakob Disease. - Viruses: Acellular entities; genetic material (DNA or RNA) enclosed in a protein coat (capsid). Obligate intracellular parasites. Examples: Influenza, HIV, COVID-19, Mpox. - Bacteria: Single-celled prokaryotic organisms. Examples: Tuberculosis, Cholera, Diphtheria, Leprosy. - Protozoa: Single-celled eukaryotic parasites. Examples: Malaria, Kala-azar, Amoebiasis. - Fungi: Spore-producing eukaryotic organisms. Examples: Ringworm, Athlete’s foot, Mucormycosis.

Classify and compare Prions, Viruses, Bacteria, Protozoa, and Fungi with examples.

Pathogen Database: - Prions: Misfolded proteins containing no nucleic acids (DNA/RNA). Cause neurodegenerative diseases. Examples: Mad Cow Disease, Creutzfeldt-Jakob Disease. - Viruses: Acellular entities; genetic material (DNA or RNA) enclosed in a protein coat (capsid). Obligate intracellular parasites. Examples: Influenza, HIV, COVID-19, Mpox. - Bacteria: Single-celled prokaryotic organisms. Examples: Tuberculosis, Cholera, Diphtheria, Leprosy. - Protozoa: Single-celled eukaryotic parasites. Examples: Malaria, Kala-azar, Amoebiasis. - Fungi: Spore-producing eukaryotic organisms. Examples: Ringworm, Athlete’s foot, Mucormycosis.

Disease Vectors & Mosquito Profiles


Match key mosquito species (Aedes, Anopheles, Culex) and flies to the pathogens and diseases they transmit.	Vectors & Pathogens: - Aedes aegypti Mosquito: Transmits Dengue, Zika, Chikungunya, and Yellow Fever. Breeds in clean, stagnant water. - Female Anopheles Mosquito: Transmits Malaria (caused by the Plasmodium protozoan parasite). - Culex Mosquito: Transmits Japanese Encephalitis (JE) and Lymphatic Filariasis. - Sandfly: Transmits Kala-azar (Leishmaniasis). - Tsetse Fly: Transmits Sleeping Sickness (Trypanosoma brucei). - Blackfly: Transmits River Blindness (Onchocerca volvulus).

Match key mosquito species (Aedes, Anopheles, Culex) and flies to the pathogens and diseases they transmit.

Vectors & Pathogens: - Aedes aegypti Mosquito: Transmits Dengue, Zika, Chikungunya, and Yellow Fever. Breeds in clean, stagnant water. - Female Anopheles Mosquito: Transmits Malaria (caused by the *Plasmodium* protozoan parasite). - Culex Mosquito: Transmits Japanese Encephalitis (JE) and Lymphatic Filariasis. - Sandfly: Transmits Kala-azar (Leishmaniasis). - Tsetse Fly: Transmits Sleeping Sickness (*Trypanosoma brucei*). - Blackfly: Transmits River Blindness (*Onchocerca volvulus*).

Wolbachia Method (Dengue Control)


Explain the Wolbachia method: concept, mechanism, and vector population suppression.	- Concept: Biological control method using Wolbachia, a naturally occurring bacterium found in 60% of insect species but not naturally present in Aedes aegypti mosquitoes. Mechanism: When Aedes mosquitoes are carrying Wolbachia, the bacterium competes with viruses like Dengue, Zika, and Chikungunya, making it extremely difficult for the viruses to replicate inside the mosquito. Vector Suppression: Infected male/female mosquitoes are released. When an infected female mates, she passes the bacterium to her offspring. If an infected male mates with an uninfected female, the eggs do not hatch (cytoplasmic incompatibility), suppressing the vector population.

Explain the Wolbachia method: concept, mechanism, and vector population suppression.

- Concept: Biological control method using *Wolbachia*, a naturally occurring bacterium found in 60% of insect species but not naturally present in *Aedes aegypti* mosquitoes.
Mechanism: When *Aedes* mosquitoes are carrying *Wolbachia*, the bacterium competes with viruses like Dengue, Zika, and Chikungunya, making it extremely difficult for the viruses to replicate inside the mosquito.
Vector Suppression: Infected male/female mosquitoes are released. When an infected female mates, she passes the bacterium to her offspring. If an infected male mates with an uninfected female, the eggs do not hatch (cytoplasmic incompatibility), suppressing the vector population.

Viral Diseases Deep Dive


Detail the genomic types and transmission routes of Hepatitis viruses, influenza strains, Mpox clades, and KFD.	Hepatitis Spectrum: - Hepatitis A & E: Transmitted via the fecal-oral route (contaminated food/water). Hepatitis E is highly dangerous for pregnant women. - Hepatitis B, C, & D: Transmitted via blood, semen, and other body fluids. Lead to chronic infection. - Genomic Note: Hepatitis B is a DNA virus; all other Hepatitis viruses (A, C, D, E) are RNA viruses. Influenza Strains: Categorized by surface proteins Hemagglutinin (H) and Neuraminidase (N) (e.g., Avian H5N1, Swine H1N1). Antigenic Drift involves small, gradual genetic mutations; Antigenic Shift refers to sudden, major genetic reassortment causing global pandemics. Mpox (Monkeypox) Clades: Double-stranded DNA virus of the Orthopoxvirus genus. Uses a process called Genomic Accordion (rapid gene duplication/loss) to adapt. Clade Ib drives the 2024 global surge (sustained human transmission); Clade II drove the 2022-23 global outbreak. Zika & KFD: Zika causes Microcephaly (underdeveloped heads) in newborns if the mother is infected. Kyasanur Forest Disease (KFD) is a tick-borne viral hemorrhagic fever endemic to the Western Ghats (Karnataka).

Detail the genomic types and transmission routes of Hepatitis viruses, influenza strains, Mpox clades, and KFD.

Hepatitis Spectrum: - Hepatitis A & E: Transmitted via the fecal-oral route (contaminated food/water). Hepatitis E is highly dangerous for pregnant women. - Hepatitis B, C, & D: Transmitted via blood, semen, and other body fluids. Lead to chronic infection. - Genomic Note: Hepatitis B is a DNA virus; all other Hepatitis viruses (A, C, D, E) are RNA viruses.

Influenza Strains: Categorized by surface proteins Hemagglutinin (H) and Neuraminidase (N) (e.g., Avian H5N1, Swine H1N1). Antigenic Drift involves small, gradual genetic mutations; Antigenic Shift refers to sudden, major genetic reassortment causing global pandemics.
Mpox (Monkeypox) Clades: Double-stranded DNA virus of the Orthopoxvirus genus. Uses a process called Genomic Accordion (rapid gene duplication/loss) to adapt. Clade Ib drives the 2024 global surge (sustained human transmission); Clade II drove the 2022-23 global outbreak.
Zika & KFD: Zika causes Microcephaly (underdeveloped heads) in newborns if the mother is infected. Kyasanur Forest Disease (KFD) is a tick-borne viral hemorrhagic fever endemic to the Western Ghats (Karnataka).

Bacterial & Parasitic Diseases Reference


Describe Trachoma, Anthrax, Leprosy, Diphtheria, and Guinea Worm Disease.	Diseases Reference: - Trachoma: Bacterial eye infection caused by Chlamydia trachomatis. Eliminated in India (2024); India is the third country in the WHO SEARO region to achieve this. - Anthrax: Caused by Bacillus anthracis; highly resilient spores can survive in soil for decades. Transmitted via inhalation, ingestion, or skin cuts; bioweapon risk. - Leprosy (Hansen's Disease): Caused by Mycobacterium leprae. Affects skin and nerves. Treated with Multidrug Therapy (MDT). - Diphtheria: Caused by Corynebacterium diphtheriae; creates a thick gray membrane in the throat, blocking airways. Prevented by the DPT vaccine. - Kala-azar (Visceral Leishmaniasis): Protozoan disease transmitted by the sandfly. Causes irregular fever, weight loss, and enlargement of the spleen/liver. - Guinea Worm Disease (Dracunculiasis): Caused by a parasitic worm transmitted by drinking water containing infected water fleas. Nearing global eradication.

Describe Trachoma, Anthrax, Leprosy, Diphtheria, and Guinea Worm Disease.

Diseases Reference: - Trachoma: Bacterial eye infection caused by *Chlamydia trachomatis*. Eliminated in India (2024); India is the third country in the WHO SEARO region to achieve this. - Anthrax: Caused by *Bacillus anthracis*; highly resilient spores can survive in soil for decades. Transmitted via inhalation, ingestion, or skin cuts; bioweapon risk. - Leprosy (Hansen's Disease): Caused by *Mycobacterium leprae*. Affects skin and nerves. Treated with Multidrug Therapy (MDT). - Diphtheria: Caused by *Corynebacterium diphtheriae*; creates a thick gray membrane in the throat, blocking airways. Prevented by the DPT vaccine. - Kala-azar (Visceral Leishmaniasis): Protozoan disease transmitted by the sandfly. Causes irregular fever, weight loss, and enlargement of the spleen/liver. - Guinea Worm Disease (Dracunculiasis): Caused by a parasitic worm transmitted by drinking water containing infected water fleas. Nearing global eradication.

2. Immunology, Antibodies & Vaccines

The Immune Defense Shield


Compare Innate and Acquired Immunity, Active and Passive Immunity, and B-cells vs T-cells.	- Innate vs Acquired: Innate is non-specific, present from birth. Consists of physical (skin/mucus), physiological (acid/tears), cellular (neutrophils/monocytes), and cytokine barriers (Interferons secreted by virus-infected cells). Acquired is pathogen-specific and characterized by memory. Active vs Passive: Active is when the body produces its own antibodies in response to an antigen (sluggish start, long-lasting). Passive is when ready-made antibodies are directly introduced (immediate, short-lived, e.g., colostrum, anti-venom). T-Cells vs B-Cells: B-lymphocytes produce antibodies into body fluids (Humoral response). T-lymphocytes do not secrete antibodies; they help B-cells and directly kill infected cells (Cell-Mediated response).

Compare Innate and Acquired Immunity, Active and Passive Immunity, and B-cells vs T-cells.

- Innate vs Acquired: Innate is non-specific, present from birth. Consists of physical (skin/mucus), physiological (acid/tears), cellular (neutrophils/monocytes), and cytokine barriers (Interferons secreted by virus-infected cells). Acquired is pathogen-specific and characterized by memory.
Active vs Passive: Active is when the body produces its own antibodies in response to an antigen (sluggish start, long-lasting). Passive is when ready-made antibodies are directly introduced (immediate, short-lived, e.g., colostrum, anti-venom).
T-Cells vs B-Cells: B-lymphocytes produce antibodies into body fluids (Humoral response). T-lymphocytes do not secrete antibodies; they help B-cells and directly kill infected cells (Cell-Mediated response).

Immunoglobulins (Antibodies) Matrix


Name the five types of Immunoglobulins and their distinct physiological roles.	Antibody Profiles: - IgG: Most abundant; found in blood and tissue fluids. The only antibody capable of crossing the placenta to provide passive immunity to the fetus. - IgM: The largest antibody; the first to be synthesized in response to an initial antigen exposure. - IgA: Found in mucosal secretions, saliva, tears, and Colostrum (first breast milk); provides localized mucosal immunity. - IgE: Primarily involved in triggering allergic reactions and defending against parasitic worm infections. - IgD: Present on the surface of B-cells; functions as an antigen receptor to initiate B-cell activation.

Name the five types of Immunoglobulins and their distinct physiological roles.

Antibody Profiles: - IgG: Most abundant; found in blood and tissue fluids. The only antibody capable of crossing the placenta to provide passive immunity to the fetus. - IgM: The largest antibody; the first to be synthesized in response to an initial antigen exposure. - IgA: Found in mucosal secretions, saliva, tears, and Colostrum (first breast milk); provides localized mucosal immunity. - IgE: Primarily involved in triggering allergic reactions and defending against parasitic worm infections. - IgD: Present on the surface of B-cells; functions as an antigen receptor to initiate B-cell activation.

Antigen vs Antibody Comparison

Compare Antigen and Antibody on definition, composition, origin, and binding site.

Feature	Antigen (Immunogen)	Antibody (Immunoglobulin)
Definition	Any foreign substance that triggers an immune response	Protective Y-shaped protein produced to neutralize antigens
Composition	Proteins, Lipids, Carbohydrates, or Nucleic Acids	Purely Proteins
Origin	Mostly external (microbes, pollen, foreign tissue)	Produced internally by plasma B-lymphocytes
Binding Site	Epitope (the specific part recognized by antibodies)	Paratope (the antigen-binding site on the antibody tip)

The 10-Tier Vaccine Classification


Outline the ten vaccine categories with examples, focusing on mRNA, viral vector, DNA plasmid, and saRNA technologies.	Vaccine Platforms: - Inactivated: Killed pathogens. Examples: Polio (IPV), Rabies, Hepatitis A, Covaxin. - Live-Attenuated: Weakened live pathogens. Examples: BCG, MMR, OPV. - Messenger RNA (mRNA): Introduces mRNA instructions to code for spike proteins. Examples: Pfizer, Moderna. - Viral Vector: Uses a modified, safe virus as a delivery carrier. Examples: Covishield, Sputnik V. - DNA Plasmid: Uses engineered circular DNA plasmids. Examples: ZyCoV-D (needle-free intradermal jet delivery). - Subunit / Recombinant: Uses specific purified fragments. Examples: Hepatitis B, HPV, Corbevax. - Toxoid: Uses inactivated bacterial toxins. Examples: Tetanus, Diphtheria. - Conjugate: Connects weak polysaccharide to strong carrier protein. Examples: PCV. - Polysaccharide: Uses pure bacterial outer sugar shells. Example: Pneumovax. - Self-amplifying mRNA (saRNA): Contains replication machinery requiring a lower dose. Example: Gemcovac-OM.

Outline the ten vaccine categories with examples, focusing on mRNA, viral vector, DNA plasmid, and saRNA technologies.

Vaccine Platforms: - Inactivated: Killed pathogens. Examples: Polio (IPV), Rabies, Hepatitis A, Covaxin. - Live-Attenuated: Weakened live pathogens. Examples: BCG, MMR, OPV. - Messenger RNA (mRNA): Introduces mRNA instructions to code for spike proteins. Examples: Pfizer, Moderna. - Viral Vector: Uses a modified, safe virus as a delivery carrier. Examples: Covishield, Sputnik V. - DNA Plasmid: Uses engineered circular DNA plasmids. Examples: **ZyCoV-D** (needle-free intradermal jet delivery). - Subunit / Recombinant: Uses specific purified fragments. Examples: Hepatitis B, HPV, Corbevax. - Toxoid: Uses inactivated bacterial toxins. Examples: Tetanus, Diphtheria. - Conjugate: Connects weak polysaccharide to strong carrier protein. Examples: PCV. - Polysaccharide: Uses pure bacterial outer sugar shells. Example: Pneumovax. - Self-amplifying mRNA (saRNA): Contains replication machinery requiring a lower dose. Example: Gemcovac-OM.

Immunization Infrastructure & Mission Indradhanush


Detail Mission Indradhanush, the U-WIN platform, and compare Sabin (OPV) vs Salk (IPV).	- Immunization Framework: Mission Indradhanush (2014): Flagship program protecting against 12 vaccine-preventable diseases (Tuberculosis, Polio, Hep B, Diphtheria, Pertussis, Tetanus, Measles, Rubella, Rotavirus, Hib, JE, Pneumococcal Pneumonia). U-WIN Platform: Digitized registry tracking schedules and certificates in real-time. OPV (Sabin) vs IPV (Salk): OPV is live-attenuated and oral, building local gut mucosal immunity but carrying a minor risk of Vaccine-Derived Poliovirus (VDPV). IPV is inactivated and injected, has zero risk of VDPV, but requires sterile needles and does not provide gut-level mucosal immunity.

Detail Mission Indradhanush, the U-WIN platform, and compare Sabin (OPV) vs Salk (IPV).

- Immunization Framework:
Mission Indradhanush (2014): Flagship program protecting against 12 vaccine-preventable diseases (Tuberculosis, Polio, Hep B, Diphtheria, Pertussis, Tetanus, Measles, Rubella, Rotavirus, Hib, JE, Pneumococcal Pneumonia).
U-WIN Platform: Digitized registry tracking schedules and certificates in real-time.
OPV (Sabin) vs IPV (Salk): OPV is live-attenuated and oral, building local gut mucosal immunity but carrying a minor risk of **Vaccine-Derived Poliovirus (VDPV)**. IPV is inactivated and injected, has zero risk of VDPV, but requires sterile needles and does not provide gut-level mucosal immunity.

3. Public Health Initiatives & Drug Regulation

Tuberculosis: The Resistance Spectrum


Classify the drug-resistant TB spectrum (RR, MDR, Pre-XDR, XDR) and explain BPaLM and Ni-kshay.	Tuberculosis Spectrum (27% global burden in India): - Rifampicin-Resistant TB (RR-TB): Resistance to Rifampicin. - Multidrug-Resistant TB (MDR-TB): Resistance to both Isoniazid and Rifampicin. - Pre-Extensively Drug-Resistant TB (Pre-XDR): MDR-TB + resistance to any Fluoroquinolone. - Extensively Drug-Resistant TB (XDR-TB): MDR-TB + resistance to any Fluoroquinolone and at least one second-line injectable drug. BPaLM Regimen: All-oral, 6-month treatment regimen (Bedaquiline, Pretomanid, Linezolid, Moxifloxacin), replacing painful 20-month regimens. Ni-kshay Ecosystem: Web surveillance database. Includes Ni-kshay Poshan Yojana (₹500 monthly DBT nutritional support) and Ni-kshay Mitra (community nutritional sponsorship).

Classify the drug-resistant TB spectrum (RR, MDR, Pre-XDR, XDR) and explain BPaLM and Ni-kshay.

Tuberculosis Spectrum (27% global burden in India): - Rifampicin-Resistant TB (RR-TB): Resistance to Rifampicin. - Multidrug-Resistant TB (MDR-TB): Resistance to both Isoniazid and Rifampicin. - Pre-Extensively Drug-Resistant TB (Pre-XDR): MDR-TB + resistance to any Fluoroquinolone. - Extensively Drug-Resistant TB (XDR-TB): MDR-TB + resistance to any Fluoroquinolone and at least one second-line injectable drug.

BPaLM Regimen: All-oral, 6-month treatment regimen (Bedaquiline, Pretomanid, Linezolid, Moxifloxacin), replacing painful 20-month regimens.
Ni-kshay Ecosystem: Web surveillance database. Includes Ni-kshay Poshan Yojana (₹500 monthly DBT nutritional support) and Ni-kshay Mitra (community nutritional sponsorship).

Antimicrobial Resistance (AMR)


What is AMR, its drivers, the Colistin ban, and Indian initiatives (Red Line, Chennai Declaration)?	AMR Drivers: Overuse/misuse of antibiotics in humans/livestock, poor infection control, and pharmaceutical waste. Colistin: A last-resort human antibiotic, banned in Indian livestock feed (2019) to prevent resistance transfer. India's Initiatives: - Red Line Campaign: Vertical red line on prescription-only packaging to warn against self-medication. - Chennai Declaration (2013): Medical roadmap to combat antibiotic resistance in Indian hospitals. - GLASS: WHO Global Antimicrobial Resistance and Use Surveillance System.

What is AMR, its drivers, the Colistin ban, and Indian initiatives (Red Line, Chennai Declaration)?

AMR Drivers: Overuse/misuse of antibiotics in humans/livestock, poor infection control, and pharmaceutical waste.
Colistin: A last-resort human antibiotic, banned in Indian livestock feed (2019) to prevent resistance transfer.
India's Initiatives: - Red Line Campaign: Vertical red line on prescription-only packaging to warn against self-medication. - Chennai Declaration (2013): Medical roadmap to combat antibiotic resistance in Indian hospitals. - GLASS: WHO Global Antimicrobial Resistance and Use Surveillance System.

National Sickle Cell Anaemia Elimination Mission (2023)


State the target year, screening scale, and strategy of the National Sickle Cell Anaemia Elimination Mission.	- Mission Directives: Target: Eliminate Sickle Cell Disease (SCD) as a public health threat in India by 2047. Strategy: Screen 7 Crore people aged 0 to 40 years in high-prevalence tribal areas. Distribute color-coded genetic cards to guide marriages and prevent sickle-trait matching.

Indian Pharmaceutical Governance


List the roles of CDSCO, DCGI, NPPA, and explain the 2025 FDC ban.	Regulatory Infrastructure: - CDSCO: National regulatory body for cosmetics, pharmaceuticals, and medical devices. - DCGI: Head of CDSCO; approves drug licenses and clinical trials. - NPPA: Regulates pricing of medicines under the Drugs Prices Control Order (DPCO) for essential medicines (NLEM). - Fixed-Dose Combination (FDC) Ban (2025): Banned 156 FDCs (e.g., Paracetamol + Nimesulide) due to safety risks and contribution to AMR.

List the roles of CDSCO, DCGI, NPPA, and explain the 2025 FDC ban.

Regulatory Infrastructure: - CDSCO: National regulatory body for cosmetics, pharmaceuticals, and medical devices. - DCGI: Head of CDSCO; approves drug licenses and clinical trials. - NPPA: Regulates pricing of medicines under the Drugs Prices Control Order (DPCO) for essential medicines (NLEM). - Fixed-Dose Combination (FDC) Ban (2025): Banned 156 FDCs (e.g., Paracetamol + Nimesulide) due to safety risks and contribution to AMR.

4. Nutrition, Dietary Fats & Deficiencies

Macronutrient Deficiencies (PEM)


Compare Kwashiorkor and Marasmus: causes, physical symptoms, and pathological signs.	Protein-Energy Malnutrition (PEM): - Kwashiorkor: Severe protein deficiency with adequate calorie intake. Characterized by Oedema (fluid retention, swollen belly/feet), "Moon face", thinning hair, and fatty liver. - Marasmus: Severe deficiency of both proteins and calories (starvation). Characterized by extreme muscle wasting, "Old man face", prominent ribs, and dry skin. No oedema or fatty liver.

Compare Kwashiorkor and Marasmus: causes, physical symptoms, and pathological signs.

Protein-Energy Malnutrition (PEM): - Kwashiorkor: Severe protein deficiency with adequate calorie intake. Characterized by Oedema (fluid retention, swollen belly/feet), "Moon face", thinning hair, and fatty liver. - Marasmus: Severe deficiency of both proteins and calories (starvation). Characterized by extreme muscle wasting, "Old man face", prominent ribs, and dry skin. No oedema or fatty liver.

🧬 Vitamins & Minerals Reference

Detail the chemical names, solubility, and deficiency diseases of key vitamins, and name essential minerals.

Vitamin	Chemical Name	Solubility	Major Deficiency Disease
Vitamin A	Retinol	Fat-soluble	Night Blindness, Xerophthalmia
Vitamin B1	Thiamine	Water-soluble	Beriberi (Wet: cardiovascular; Dry: nervous)
Vitamin B2	Riboflavin	Water-soluble	Ariboflavinosis (cracked lips/cheilosis)
Vitamin B3	Niacin	Water-soluble	Pellagra (Dermatitis, Diarrhea, Dementia, Death)
Vitamin B9	Folic Acid	Water-soluble	Megaloblastic Anemia, Neural Tube Defects in newborns
Vitamin B12	Cyanocobalamin	Water-soluble	Pernicious Anemia (synthesized by bacteria, not plants)
Vitamin C	Ascorbic Acid	Water-soluble	Scurvy (bleeding gums, delayed wound healing)
Vitamin D	Calciferol	Fat-soluble	Rickets (children), Osteomalacia (adults)
Vitamin E	Tocopherol	Fat-soluble	Hemolytic Anemia, neurological issues, reduced fertility
Vitamin K	Phylloquinone	Fat-soluble	Defective blood clotting (hemorrhage)

Key Minerals: - Iron: Anemia (essential for hemoglobin synthesis). - Iodine: Goitre, Cretinism (mental/physical developmental delays in children). - Selenium: Essential in trace amounts; excess causes Selenium Toxicity leading to Telogen Effluvium (hair loss).

Food Fortification & Safety


Explain Food Fortification vs Biofortification, trans fats toxicity, and regulatory caps in India.	- Food Fortification: Deliberately increasing essential micronutrient content during processing (FSSAI +F logo). E.g., Fortified Rice (Iron, Folic Acid, Vitamin B12). Biofortification: Breeding nutrients directly into crops using conventional or biotech methods. E.g., Zinc-rich wheat, Madhuban Gajar. Dietary Fats: Unsaturated fats are liquid at room temperature and heart-healthy (MUFAs, PUFAs). Saturated fats are solid. Trans fats are artificially hydrogenated oils that raise LDL and lower HDL. FSSAI caps industrial trans fats to < 2% in all oils/fats in India. WHO REPLACE package targets global elimination.

Explain Food Fortification vs Biofortification, trans fats toxicity, and regulatory caps in India.

- Food Fortification: Deliberately increasing essential micronutrient content during processing (FSSAI +F logo). E.g., Fortified Rice (Iron, Folic Acid, Vitamin B12).
Biofortification: Breeding nutrients directly into crops using conventional or biotech methods. E.g., Zinc-rich wheat, Madhuban Gajar.
Dietary Fats: Unsaturated fats are liquid at room temperature and heart-healthy (MUFAs, PUFAs). Saturated fats are solid. Trans fats are artificially hydrogenated oils that raise LDL and lower HDL. FSSAI caps industrial trans fats to < 2% in all oils/fats in India. WHO REPLACE package targets global elimination.

5. Medical Technologies & Recent Trends

Diagnostic & Research Breakthroughs


Explain the significance of HeLa cells, Optical Tweezers, MRI mechanics, and the BHISHM Cube.	Medical Breakthroughs: - HeLa Cells: First immortal human cell line (1951, Henrietta Lacks). Used to develop polio vaccine, map genes, and test cancer therapeutics. - Optical Tweezers: Laser-based technique allowing physical manipulation of single atoms, bacteria, and DNA without damage. - MRI (Magnetic Resonance Imaging): Uses strong magnetic fields to excite hydrogen nuclei (protons) in the body, measuring energy release for high-resolution images. - BHISHM Cube: World's first portable, modular disaster hospital (Aarogya Maitri Cube), capable of treating 200 casualties.

Explain the significance of HeLa cells, Optical Tweezers, MRI mechanics, and the BHISHM Cube.

Medical Breakthroughs: - HeLa Cells: First immortal human cell line (1951, Henrietta Lacks). Used to develop polio vaccine, map genes, and test cancer therapeutics. - Optical Tweezers: Laser-based technique allowing physical manipulation of single atoms, bacteria, and DNA without damage. - MRI (Magnetic Resonance Imaging): Uses strong magnetic fields to excite hydrogen nuclei (protons) in the body, measuring energy release for high-resolution images. - BHISHM Cube: World's first portable, modular disaster hospital (Aarogya Maitri Cube), capable of treating 200 casualties.

Recent Medical Innovations


Detail Semaglutide (Wegovy/Ozempic), Proton Arc Therapy, nanozymes, and the THOTA Act.	Medical Innovations: - Wegovy / Ozempic: Appettite-suppressing weight management drugs using Semaglutide (GLP-1 Receptor Agonist). - SPArc (Proton Arc Therapy): Targeted rotating proton beams delivering high radiation to tumors while sparing surrounding tissues. - Nanozymes: IISc developed Vanadium Pentoxide ($V_2O_5$) nanoparticles that mimic natural enzymes to prevent blood clots. - THOTA (1994): Transplantation of Human Organs Act; bans commercial organ trade, sets donor age limit to >18 years, prefers close relatives.

Detail Semaglutide (Wegovy/Ozempic), Proton Arc Therapy, nanozymes, and the THOTA Act.

Medical Innovations: - Wegovy / Ozempic: Appettite-suppressing weight management drugs using Semaglutide (GLP-1 Receptor Agonist). - SPArc (Proton Arc Therapy): Targeted rotating proton beams delivering high radiation to tumors while sparing surrounding tissues. - Nanozymes: IISc developed Vanadium Pentoxide ($V_2O_5$) nanoparticles that mimic natural enzymes to prevent blood clots. - THOTA (1994): Transplantation of Human Organs Act; bans commercial organ trade, sets donor age limit to >18 years, prefers close relatives.

Health, Nutrition & Diseases ​

1. Pathobiology & Vector-Borne Diseases ​

2. Immunology, Antibodies & Vaccines ​

3. Public Health Initiatives & Drug Regulation ​

4. Nutrition, Dietary Fats & Deficiencies ​