The US Food and Drug Administration will now require Covid-19 vaccines from Pfizer/BioNTech and Moderna to use expanded warning labels with more information about the risk of a rare heart condition after vaccination.

The Food and Drug Administration says it has decided to continue approving COVID-19 vaccine updates for seniors and others at higher risk of severe disease, but will require vaccine makers to conduct major new clinical trials before approving them for wider use.

In calling for more clinical testing of vaccines in younger people and those who face a low risk of severe disease from Covid-19, the FDA said its policy will compel generation of more evidence for these groups.

A group of experts who advise the US Food and Drug Administration on its vaccine decisions voted unanimously Thursday to make a broad recommendation about which lineage of the coronavirus should be included in this year’s Covid-19 vaccines,

The Trump administration has moved to end funding for a broad swath of HIV vaccine research, saying current approaches are enough to counter the virus, multiple scientists and federal health officials say.

The FDA announced a policy shift for COVID-19 vaccine approvals to focus on Americans considered high-risk of contracting the virus, and those older than age 65.