The new vaccine is indicated for individuals who have been previously vaccinated with any COVID-19 vaccine and are 65 years or older, or 12 to 64 years of age with at least 1 underlying condition that ...

U.S. public health authorities have skirted normal procedures and announced two major policy changes that will likely reduce ...

There have been 258 placebo-controlled clinical trials of vaccines, according to a new research project. More than half of ...