Vaccines and therapies for infectious diseases have saved many lives. Control of many infectious diseases has been one of medicine’s greatest accomplishments. Before the 20th century,...
Long before anybody understood anything about vaccination, it was noticed that, if people recovered from a disease, they didn’t get that particular disease again.
It doesn’t breathe, it doesn’t eat, it doesn’t excrete, and it doesn’t grow – so it can’t be alive, can it? It hijacks a living cell...
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