Does this mean we are all going to die soon?

[meridannight]

In some of the worst diseases to effect the world, there are always some that, for some reason, are routinely exposed to these communicable diseases and just do not get them.

well, it's not ''just don't get them''. there's a physical reason why some individuals don't contract some diseases when coming into contact with them. for example, it is thought that some people in Europe survived the smallpox due to a genetic mutation they had. this is the same mutation that now renders some individuals resistant to certain strains of HIV. physiologically it is a mutation in a chemokine receptor protein gene that ultimately prevents HIV virus from entering the cell. if it can't enter the cell it can't replicate, can't survive in the body. those who are homozygous for this mutation are highly resistant to certain strains of HIV.

nobody is resistant or immune to everything though. but yeah, it takes a lot more than that to wipe out the human race.