Health Revision

4. A substance with no active ingredients used as a control in testing.
7. Protection of unvaccinated individuals when most of a population is vaccinated.
8. The body’s ability to resist infection.
9. The introduction of antigens to stimulate immunity.
10. A state of physical, mental, and social well-being.
12. The stage of drug testing using cells and animals.
13. A protein produced by white blood cells to neutralize pathogens.

1. A condition that impairs normal functioning of the body.
2. A trial where neither participants nor researchers know who receives the active treatment.
3. A microorganism that causes disease.
5. A risk factor for non-communicable diseases related to choices like diet and exercise.
6. The process by which white blood cells engulf and
11. A medicine used to treat bacterial infections.