By Ronald C Desrosiers Smallpox has been eradicated from the face of the Earth following a highly effective, worldwide vaccination campaign. Paralytic poliomyelitis is no longer a problem in the US because of the development and use of effective vaccines against the poliovirus.

HIV/AIDS vaccine: Why don’t we have one after 37 years, when we have several for COVID-19 after a few months?

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HIV/AIDS vaccine: Why don’t we have one after 37 years, when we have several for COVID-19 after a few months?