Immune system part 2

A flu build a resistance to drug treatment because if you take a drug for a the flu, the drug is only for that form and it is possible for a diffrent type of flu to evolve. Some doctors prescribe a anti-virus to often and it gives a virus a chance to evolve. Tamiflu and relenza interferes with flu viral reproduction. Viruses can not reproduce by themselves. Anti-biotics can not treat the flu. They do not work on viruses because they are not alive.