Covid cases rising in US as officials plan to restrict booster vaccines

Risks of a wave are compounded by new vaccine restrictions from the Trump administration

Covid is on the rise again in the US, as children begin returning to school and as officials plan to restrict booster shots.

While cases are increasing less quickly than at the start of other surges, it is too soon to tell how big the current late-summer wave could get - and with highly varied immune responses from prior infections and vaccinations, it is difficult to know how severe illness could be, experts said.