Those who’ve dodged COVID-19 for more than four years may have a newly discovered immune response to thank. The results stem from a challenge trial: At the height of the pandemic in 2021, scientists ...

For months, a purported warning has spread on social media about an alleged "new COVID-Omicron XBB variant" — a new strain of the coronavirus that has spread globally since early 2020. Framed as ...

The content on this page is provided for reference purposes only. This content has not been altered or updated since 22 December 2022 The EU and its member states have taken action to minimise the ...

The content on this page is provided for reference purposes only. This content has not been altered or updated since 22 December 2022 The development and distribution of an effective and safe vaccine ...

Yearly Covid-19 Booster Recommendations in Canada, Europe, and Australia. Although the rapid development of multiple Covid-19 vaccines in 2020 represents a major scientific, medical, and regulatory ...

Ziyad Al-Aly is chief of research and development at VA St. Louis Health Care System and a clinical epidemiologist at Washington University in St. Louis. Since 2020, the condition known as long ...