Your friend spends most of his free time eating junk food and playing games on the computer. he has a very low energy level and many aches and pains. which way on the health continuum is he moving?
a: wellness
b: long life expectancy
c: illness
d: obesity
i think it is obesity am i correct?

Answer the militia grew;

Immunization is the introduction of a foreign substance to provoke  the immune response system.  immunizations are the same as vaccinations. it introduces foreign (but dead/ weakened) illnesses to train the body to fight against them. specific viruses and bacteria have specific antigens, antigens act sort of like name tags. these name tags the immune system recognize what's dangerous to the body and what's safe. 

I'm pretty sure it's worms.