The University of Waterloo's wastewater monitoring shows an Omicron subvariant has been detected in Waterloo region. The BA.2 subvariant appears to be even more transmissible than the original Omicron ...

The Omicron variant spreads easier than other variants of coronavirus, and people can get it twice. Reinfection is possible even if a person has already had this virus or is fully vaccinated. Several ...

The Centers for Disease Control and Prevention on Wednesday backed a second dose of the updated Covid boosters for older adults and people with weakened immune systems. Subscribe to read this story ad ...

The dominant variant of the coronavirus has proved to be not only staggeringly infectious, but an evolutionary marvel. By Carl Zimmer By November 2021, nearly two years after the coronavirus emerged ...

The U.S. Food and Drug Administration authorized Pfizer's omicron booster shot for kids younger than five who were previously vaccinated with three doses of the company's original vaccine. Children ...