Pfizer’s vaccine reduces Covid transmission better than any other vaccine
Researchers are getting the first real-world evidences that a vaccine can control the coronavirus’s spread, not just prevent people from getting seriously ill. People vaccinated with Pfizer’s shots and who still get infected with the coronavirus carry less virus in their
After 40 years of AIDS, Why we still don’t have an HIV vaccine?
Forty years ago, researchers described a mysterious case of five homosexual men who developed pneumonia caused by the Pneumocystis carinii fungus. Two of the five had already died. This type of pneumonia usually only affects people with severe immunodeficiency, the researchers