Are We Safe?

So far we've talked about the virus and what it causes, but if every human infected with a virus died we would have been half of the amount of what we are today which means humans have a solution for almost everything including a virus infection. How is that so?

Viral infections in animals provoke an immune response that usually eliminates the infecting virus. These immune responses can also be produced by vaccines, which give immunity to specific viral infections. However, some viruses including HIV and those causing viral hepatitis evade these immune responses and cause chronic infections. Microorganisms also have defences against viral infection, such as restriction modification systems.

Antibiotics have no effect on viruses, but a few antiviral drugs have been developed. However, there are relatively few antivirals because there are few targets for these drugs to interfere with. This is because a virus reprograms its host's cells to make new viruses and almost all the proteins used in this process are normal parts of the body, with only a few viral proteins.

Can you name 3 types of vaccines that you know and what viruses they're used to cure?