J&J, without details, makes case for a coronavirus booster shot
A second shot given six months after the first appears to provide a bigger immune response, the company said, a finding J&J aims to take to regulators in the U.S. and elsewhere.
A second shot given six months after the first appears to provide a bigger immune response, the company said, a finding J&J aims to take to regulators in the U.S. and elsewhere.