The city of Philadelphia's renewed mask mandate went into effect today, as the city's infection rate has nearly doubled over the past two weeks.

The CDC recently extended the mask mandate to allow more time to study the BA.2 omicron subvariant responsible for the vast majority of cases in the U.S.

Some groups of people are eligible for second COVID-19 booster shots. But the advice around boosters can be confusing. Here’s what Penn experts suggest you know.

Attorney Thomas W. King III said the city’s emergency order went against Centers for Disease Control and Prevention recommendations and “imposed a renegade standard."

The InspectIR COVID-19 Breathalyzer is about the size of a piece of carry-on luggage, the FDA said, and can be used in doctor’s offices, hospitals and mobile testing sites.

Philadelphia’s indoor mask mandate was triggered by the city’s COVID risk measurement system. Public health experts weigh in on how well that system works.

The number of COVID infections and hospitalizations is up substantially in the last few weeks, but the numbers are a mere fraction of mid-January’s peaks.

The Biden administration will extend for two weeks the nationwide mask requirement for public transit as it monitors an uptick in COVID-19 cases.

It goes into effect on Monday, April 18.

Just 26% of Philadelphia’s spending on goods and services went to local suppliers, well short of the city’s 58% goal.

Philadelphia officials announced Monday that masks will once again be required in indoor spaces.

The initiative teams Bloom Planning and Delaware County in an effort to revamp mental and behavioral health services for school children.

The plan includes “wireless technology” to allow for safer public participation.

In a 2-1 ruling Thursday, a panel of the 5th Circuit Court of Appeals in New Orleans reversed a lower court and ordered dismissal of a lawsuit challenging the mandate.

Health experts warn the suspension of COVID aid for poorer countries could ultimately spur the kind of unchecked transmission needed for the next worrisome variant to emerge.