Covid 19 Delta outbreak: CDC panel recommends Pfizer, Moderna vaccines over J&J shot

A member of the Philadelphia Fire Department prepares a dose of the Johnson & Johnson COVID-19 vaccine at a vaccination site setup in Philadelphia. Photo / AP

Most Americans should be given the Pfizer or Moderna vaccines instead of the Johnson & Johnson shot that can cause rare but serious blood clots, US health advisers recommended Thursday.

The strange clotting problem has caused nine confirmed deaths after J&J vaccinations — while the Pfizer and Moderna vaccines don't come with that risk and also appear to be more effective, advisers to the Centers for Disease Control and Prevention said.

It's an unusual move and the CDC's director, Dr. Rochelle Walensky, must decide whether to accept the panel's advice.

Until now the U.S. has treated all three Covid-19 vaccines available to Americans as an equal choice, since large studies found they all offered strong protection and early supplies were limited. J&J's vaccine initially was welcomed as a single-dose option that could be especially important for hard-to-reach groups like homeless people who might not get the needed second dose of the Pfizer or Moderna options.

But the CDC's advisers said that it was time to recognize a lot has changed since vaccines began rolling out a year ago. More than 200 million Americans are considered fully vaccinated, including about 16 million who got the J&J shot.

A member of the Philadelphia Fire Department prepares a dose of the Johnson & Johnson COVID-19 vaccine at a vaccination site setup in Philadelphia. Photo / AP

A government advisory panel is meeting Thursday to determine if any restrictions are needed for the Johnson & Johnson COVID-19 vaccine because of rare but serious blood clots.

A strange clotting problem prompted the US to temporarily halt the single-dose J&J shots last April while scientists investigated. Eventually regulators decided the benefits of a one-and-done vaccine outweighed what was considered a very rare risk -- as long as recipients were warned.

While it's still rare, the Food and Drug Administration told health care providers this week that more cases have occurred since the spring. They occur most in women between 30 and 49 -- about once for every 100,000 doses administered, the FDA said.

Overall, the government has confirmed 54 clot cases in both women and men, and nine deaths that included two men, Dr. Isaac See of the Centers for Disease Control and Prevention said Thursday. He said two additional deaths are suspected.

The CDC decides how vaccines should be used in the U.S., and its influential advisory committee is deliberating whether the newest safety data warrants any new limits on J&J's vaccine.