Health & Science

Yes, that was the plan. Then along came the Delta variant. And now people who are vaccinated are wondering: Are there circumstances in which a mask would be advisable?

Citing new information about the ability of the delta variant to spread among vaccinated people, the CDC also recommended indoor masks for all teachers, staff, and students.

RWJBarnabas Health said Monday that it is extending its COVID-19 vaccine mandate to all staff including all employees, new employees and medical staff.

Philly Counts has been working with 18 priority neighborhoods since January, when it pivoted from its 2020 census effort to help communities fight COVID-19.

COVID-19 cases are on the rise again in New Jersey, and Gov. Phil Murphy is telling people to please get vaccinated if they haven’t already.

Some patients who've had COVID develop symptoms resembling early Alzheimer's. Researchers are trying to determine whether they're are more likely to develop the disease itself

These charts will update weekly.

Scientists are meeting to finalize a landmark climate report. It's meant to guide the next decade of international climate policy, but it's unclear if politicians will act.

The way doctors treat COVID-19 patients has evolved as scientists come to better understand the virus and more studies are published. Here’s what you need to know.

He said recommending that the vaccinated wear masks is "under active consideration’’ by the government’s leading public health officials

A lot of teens are still deciding about the vaccine. People ages 12 and up have been able to get one since mid-May, but two out of three teens have not gotten their shots.

The Philadelphia Zoo is awaiting approval from the state to vaccinate some of its animals with a COVID-19 vaccine.

As the delta variant causes an increase in new COVID-19 cases, city health officials are urging residents to mask up in indoor public spaces.

That means “that there will be more preventable cases, more preventable hospitalizations and more preventable deaths,” said Dr. Amesh Adalja.

The share of employed people working from home shot up from just 22% in 2019 to 42% in 2020, the Labor Department said Thursday.