PHILADELPHIA (WPVI) -- When comparing omicron vs. delta variants, omicron has 53% less risk of hospitalization and 91% less risk of death, CDC Director Dr. Rochelle Walensky revealed on Wednesday.

All but one positive Covid-19 test sample sequenced this week from Erie County turned out to be the Delta variant, a strain wreaking havoc in several Southern states and regions across the country ...

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 ...

The variant of the SARS-CoV-2 virus called delta continues to spread rapidly across many parts of the world. What do we know about this variant so far? Share on Pinterest What do scientists know about ...

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, ...

The University at Buffalo uses genomic sequencing to determine what kind of new coronavirus variants are causing Covid-19 in Western New York. Jennifer Surtees is associate professor of microbiology ...