COVID-19 is a highly contagious disease that results from an infection with the virus SARS-CoV-2, a type of coronavirus. COVID-19 can occur without any symptoms. It can also cause symptoms that are ...

The U.S. currently uses five COVID-19 vaccines from Pfizer, Moderna, and Novavax. All are safe and effective against the coronavirus, especially in preventing hospitalization and death. The Centers ...

If the COVID-19 pandemic has done one thing, it’s made us all more familiar with some of the important players in the immune system. Antibodies, B cells, and T cells are among the best known parts of ...

Share on Pinterest New CDC data indicate that “Stratus” has become the predominant variant in the United States. Rifka Hayati/Getty Images A recent uptick in COVID-19 cases has been linked to a new ...

The COVID-19 pandemic was caused by a novel coronavirus, first isolated in January 2020. But a viral video has been spreading a conspiracy theory that the pandemic has actually been a plot to poison ...

COVID-19 is a disease caused by SARS-CoV-2 that can trigger what doctors call a respiratory tract infection. In early 2020, the World Health Organization identified SARS-CoV-2 as a new type of ...

A long post claiming COVID-19 is not, in fact, caused by a virus but, instead, by a bacterium has gone viral. The post says that Italian doctors, in defiance of the World Health Organization, have ...

COVID-19 is a respiratory condition caused by a coronavirus. Some people are infected but don’t notice any COVID-19 symptoms (doctors call that being asymptomatic). Most people have mild symptoms and ...

COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers for Disease Control and Prevention. Some regions of the United States ...

Throughout history, nothing has killed more human beings than infectious disease. Covid-19 shows how vulnerable we remain – and how we can avoid similar pandemics in the future. The novel coronavirus ...

In fall of 2019, exactly zero scientists were studying COVID‑19, because no one knew the disease existed. The coronavirus that causes it, SARS‑CoV‑2, had only recently jumped into humans and had been ...