Canada's main stock index fell for a fourth day on Tuesday, as the spreading Delta variant of the coronavirus contributed to ...

The more contagious Delta variant of Covid-19 now makes up 83% of sequenced samples in the United States, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Tuesday.

NEW YORK, N.Y. — Pfizer announced Wednesday that data shows a third dose of its COVID-19 vaccine can “strongly” boost protection against the highly transmissible delta variant. The pharmaceutical and ...

Canada's main stock index fell to its lowest level in nearly three weeks on Wednesday as investors weighed rising global ...

The delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the US Centers for ...

As the highly contagious Delta variant of COVID-19 continues to surge in populations with low vaccination rates, doctors are looking more closely at the origins of another variant. The Epsilon variant ...

One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it keeps changing. Since the start of the pandemic, we have seen several notable variants, including Alpha, Beta, ...

The Pennsylvania Department of Health reported 214 newly confirmed COVID-19 cases among children in Erie County between Sept. 29-Oct. 5, compared to 197 cases between Sept. 22-28.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. The Centers for Disease Control and ...

A number of pediatric hospitals across the country are warning about an increase in the number of cases of multi-system inflammatory syndrome in children, a rare condition in which different parts of ...