(CNN)US health officials are urgently working on a plan to allow second Covid-19 boosters for all adults, a senior White House official confirmed to CNN on Monday. The US Food and Drug Administration is making it a high priority the official said. Second boosters have been authorized for adults 50 and older, as well as some people with weakened immune systems, since late March. But younger adults are eligible for only one booster shot, which was authorized in November. Federal agencies are looking to move quickly on authorizing a second booster for all adults, the source said.

Some experts are concerned that younger adults' immunity may be waning as Covid-19 cases rise with the dominance of the BA.5 Omicron subvariant. Reinfections are more likely with BA.5 than with any previous variants because of immune escape features, Dr. Eric Topol, a cardiologist and professor of molecular medicine at Scripps Research, said on CNNI Monday.

Turns out when you have a vaccine only approach to a disease, keeping people vaccinated is important! Who could have predicted this?