We've all gotten vaccinations, but what are they really? Why do we need them? Are there any negative effects from them? Who developed the smallpox vaccine? Are scientists working on new ones? Why are they controversial? Get a healthy does of information from this up-to-date-resource.
We've all gotten vaccinations, but what are they really? Why do we need them? Are there any negative effects from them? Who developed the smallpox vaccine? Are scientists working on new ones? Why are they controversial? Get a healthy does of information from this up-to-date-resource.