The uterus, specifically the Fallopian tube.
<span>vaccine
The wording given is pretty much the exact definition of a vaccine. The key to how a vaccine works is that it provides to the immune system, samples of the surface proteins of the infectious materials. With those samples available, the immune system is able to produce antibodies that react to those proteins.</span>
Viruses are much smaller then cells, viruses have genetic material DNA or RNA and cells also have genetic material
I think its reproductive cells like egg or sperm