Two newly designated SARS-CoV-2 lineages, informally called Nimbus (NB.1.8.1) and Cicada (BA.3.2), are fueling a summer surge ...

The Omicron RF.5 subvariant is spreading rapidly across India. Scroll down to know why this variant is different, how efficient previous vaccines are, and who is at risk of another infection.

More than a quarter of the world's population is affected by helminth infections, which can profoundly alter the immune ...

SARS-CoV-2, the virus that causes COVID-19, has been linked to many different health conditions, and it can impact many ...

The COVID pandemic feels like a long time ago. Now, we have widespread immunity from vaccination and natural infection. And ...

The 2025-2026 SARS-CoV-2 vaccines provided protection against ED/UC visits and hospitalizations among immunocompetent adults.

World Health Organization officials first learned about a cluster of cases of pneumonia in the Hubei Province of China on Dec. 31, 2019. This represented the initial report of what soon became known ...

We conducted a phase 2–3 double-blind trial to assess the efficacy and safety of nirmatrelvir–ritonavir in asymptomatic, rapid antigen test–negative adults who had been exposed to a household contact ...

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 ...