Now researchers in the U.K. have the first estimates for how long a third shot of the Pfizer vaccine will last. The findings are mixed.

The order means health care workers who are unvaccinated will have until Jan. 27 to get their first shot and until Feb. 28 for the second.

Even as Philly officials vow to reduce omicron’s interruptions to in-person learning, the school district’s shifts to virtual are causing angst.

Members of the Medical Reserve Corps, both medical and non-medical volunteers, assist health care personnel with their workloads.

Hospital leaders report they are seeing a dramatic rise in patients, however, and urge individuals to seek testing away from the ERs.

Experts say the plan to distribute 1 billion tests is a good first step, but it must become a regular part of the pandemic response.

Cases are down from their peak around Jan. 9, city Health Commissioner Bettigole said. Hospitalizations, which lag new cases, are up.

"The protections offered by surgical and/or isolation masks outweigh those provided by cloth masking," said Main Line Health.

The masks will be available for pickup at pharmacies and community health centers across the country.

Philly’s COVID-19 vaccine requirement for indoor dining is now fully in effect. So what does this mean for restaurant operators and workers?

The website appears not to recognize some residences within multi-unit buildings as individual households.

Delaware’s daily cases and hospitalizations have dropped over the last five days, fueling guarded optimism from the governor and health officials.

The website, COVIDTests.gov, now includes a link for Americans to order four at-home tests per residential address, to be delivered by the U.S. Postal Service.

“A lot of people are still going to die because of how transmissible omicron has been,” said one epidemiologist, adding it "is going to get worse before it gets better."

Employers from Macy's to United Airlines are having to adjust after skyrocketing omicron COVID cases have led large numbers of workers to call out sick.