Delta has kept some of the most successful mutations found in earlier variants, but also contains new genetic changes that enable it to spread twice as fast.
Smoke and heat in the West are driving people to seek refuge at libraries, movie theaters, museums and other indoor venues.
The question for health experts is not if the latest and most contagious strain of COVID-19 will spread through communities, but how large the outbreak will be.
China has great scientists, but they work for an authoritarian government where politics always comes first, making it dangerous to reveal something that makes China look bad.
The scientist at the center of the storm can't disprove that the virus resulted from a lab leak in China -- though he doesn't believe it.
“We’re now seeing people in their 30s, 40s and 50s — young people who are really sick,” said Dr. Vishnu Chundi, an infectious disease specialist.
A team of OHSU infectious disease specialists studied the immune response of people who had been vaccinated with those who had been infected and then vaccinated.
This article is for premium subscribers. Please sign up here for a tax-deductible subscription.
If you're a premium subscriber, sign in below.
The Oregon Health Authority reported a fifth week of surging cases and a hospitalization rate of COVID-19 patients that has doubled.