vaccine boosters

A fourth dose of the Pfizer/BioNTech vaccine lowered rates of COVID-19 among the elderly but the protection against infection appeared short-lived, a large study in Israel has found.

Kim Iversen airs her grievances about the U.S. Covid-19 response.

A preliminary study in Israel, believed to be the world's first, found that a fourth COVID-19 vaccine is not enough to prevent omicron infections.

General Mark Milley, chairman of the Joint Chiefs of Staff, has tested positive for Covid-19 and is working remotely, the Pentagon has announced. One other member of the Joint Chiefs is positive, but the military did not say who.

European Union regulators warned that frequent Covid-19 booster shots could adversely affect the immune response and may not be feasible.

Professor Ehud Qimron, head of the Department of Microbiology and Immunology at Tel Aviv University and one of the leading Israeli immunologists, has written an open letter sharply criticizing the Israeli – and indeed global – management of the coronavirus pandemic.

A fourth COVID shot may be needed for most people by next fall because of what will likely be waning immunity, Moderna CEO Stephane Bancel said Thursday.

An appeals court upheld a decision to temporarily block a vaccine mandate for federal contractors in three states in a ruling issued on Wednesday.

The View host Whoopi Goldberg expressed “shock” at catching COVID-19 despite the fact that she had been triple vaccinated.

The language around what constitutes fully vaccinated against Covid-19 is being replaced, in the strongest indication by White House chief medical adviser Anthony S. Fauci that two shots of a messenger RNA vaccine fall short of protection amid the highly transmissible omicron variant.