The 79-year-old president "will isolate at the White House and will continue to carry out all of his duties fully during that time," a White House statement said.

The BA.5 strain represented 65% of cases from July 3 to 9, according to data from the Centers of Disease Control and Prevention.

The Florida-based Publix grocery store chain is not offering the COVID-19 vaccine to children younger than 5 but has not explained its decision.

Florida is the only state in the country that didn't request COVID-19 vaccine from the federal government to give to children as young as 6 months. But the vaccine still should be available from doctors and pharmacies.

As the Food and Drug Administration weighs approval of COVID-19 vaccinations for children under age 5, Florida Surgeon General Joseph Ladapo is opposed to the potential change.

Residents are urged to wear a mask indoors in public, stay up to date with COVID-19 vaccines and boosters, and get tested if they have symptoms.

The number of COVID-19 patients in intensive-care units also has increased.

While cases and hospitalizations have been rising, they are still at relatively low levels when compared to previous periods of the pandemic.

A federal judge in Florida has voided the national mask mandate covering airplanes and other public transportation as exceeding the authority of U.S. health officials even in the coronavirus pandemic.

Attorney General Ashley Moody, joined by attorneys general from 20 other states, contends that the federal Centers for Disease Control and Prevention has overstepped its legal authority in requiring masks for travelers.