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 ...

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 ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

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 ...