epidemiology is the study of the frquency and distribution of a disease in a defined population
I would think it would be full body exercises because you are covering the entire body but I'm not too sure. I can't really see how it would help your immune system because the immune system is what protects your body from disease, virus, etc...
The answer is simple currently I am in 9th and scored more than 90 percent by following methods:
1) sleep early and rise early ( it really helps)
2) Eat healthy food ( It keeps out brain active)
3) DO NOT PROCRASTINATE
4)Study on time and take break after every 1 hour
5) Do exercise it improves blood circulation (Helps brain)
6)Dont eat sweet and oily food
Use cymath your welc 5 pints