delta-variant
COMMENTARY 
Massive COVID-19 infections, not the vaccine, are responsible for new variants | Analysis
The best way to stop new variants is to stop their spread, and the answer to that is vaccination.
COMMENTARY 
Delta Variant 101: What you need to know to protect yourself | Thursday Morning Coffee
Here's how the rapidly spreading Delta variant might change your behavior.
Acting Philadelphia health commissioner warns residents about COVID-19 Delta variant
Currently, 55.9 percent of Philadelphia adults are fully vaccinated, and 70.4 percent of Philadelphia adults have received their first jab.