US biotech firm says its vaccine protects against all emerging strains but is developing the booster for the South Africa one "out of an abundance of caution"
US biotech firm says its vaccine protects against all emerging strains but is developing the booster for the South Africa one "out of an abundance of caution"
Former FDA commissioner Dr. Scott Gottlieb said inoculations "should be a backstop" against a new coronavirus variant initially..
A new Covid-19 vaccine is to be assessed for use in the U.K. after it was shown to be nearly 90 per cent effective.