Coronavirus infections are climbing again, marking another summer wave as children go back to school.

But this uptick arrives with an added layer of uncertainty because it’s unclear when and which Americans can receive updated vaccines this fall.....

The federal committee that would recommend the updated coronavirus vaccine is not expected to meet until at least mid-September, according to industry employees and Centers for Disease Control and Prevention officials who spoke on the condition of anonymity to share sensitive information. By that point, the summer covid wave could be over, but Americans could still get a boost of immunity ahead of an expected winter wave......

For the coming fall season, the FDA has not yet approved an updated coronavirus vaccine. In recent years, the agency has typically signed off on an updated version by late August or early September in order for pharmacies and doctors’ offices to place orders.

But the agency is expected to narrow its approval for the vaccine to those 65 and older, as well as others considered at high risk for severe disease. The new approach marks a significant shift from past years when the shots have been broadly available, including to children and generally healthy adults.