Researchers expressed concern Wednesday about the preliminary findings, in large part because they suggest that future mutations could undermine vaccines. One way vaccine...

How could scientists race out COVID-19 vaccines so fast without cutting corners? A head start helped -- over a decade of behind-the-scenes research that had new vaccine t...

Many scientists dont expect a coronavirus vaccine to be nearly as protective as the measles shot. If the best COVID-19 vaccine is only 50% effective, "thats still to me a...