SAN FRANCISCO -- With the Delta variant and breakthrough cases of COVID-19 reported, some vaccinated people are wondering when, if at all, they should get tested. Health officials say there are at ...

Some Americans who received the Covid-19 vaccine earlier this year are hearing surprising and relatively rare news: They’ve tested positive for the coronavirus. These so-called breakthrough cases are ...

NEW YORK -- This holiday season held promise for Americans, many of whom spent Christmas 2020 in quarantine or away from loved ones due to a nasty winter COVID-19 surge. Yet in the last week or so, ...

July 22 (Reuters) - U.S. laboratory Quest Diagnostics Inc (DGX.N), opens new tab said on Thursday demand for COVID-19 testing had increased since the end of June as the more infectious Delta variant ...

A blue gloved hand in the lab holding tubes of blood identified with the label COVID-19 New Variant. The COVID-19 pandemic was the third leading cause of death globally in 2020 and the second in 2021, ...

A certain mutation in the COVID-19 Delta variant causes infected cells to form disruptive chunks in the lungs and leads to ...

ENOLA, Pennsylvania (WPVI) -- Pennsylvania will offer voluntary COVID-19 testing in all K-12 schools, state health and education officials announced Monday. School districts will have to opt-in, and ...

While the Biden administration plays for time, some lawmakers believe sanctions would be the faster route to establishing whether the origin of covid-19 was a lab-leak in Wuhan, China. Image: Roman ...

TOPEKA – With the increased presence of the Delta variant in the region, local health departments, providers, and community groups are continuing to hold free COVID-19 vaccine and testing clinics.