More evidence has emerged that immunity to Covid-19 is quick to fade—in people of all ages, but more so for the old…

How do we understand the decision of the National Institutes of Health (NIH) to halt the Eli Lilly antibody treatment trial? Is…

The COVID vaccine challenge in the United Kingdom—where young, healthy individuals are deliberately infected with SARS-CoV-2—is no gutsy gambit or bold step forward as…

The largest population level study of the prevalence of antibodies against the virus that causes Covid-19 was recently completed in Brazil. Population based information…

The first ever large scale study using contact tracing data from two states in India provides critical new information about the virus that causes…

On Friday, the U.S. Food and Drug Administration (FDA) gave its first official stamp of approval to a Covid-19 drug — remdesivir….

When Covid-19 began to spread in the United States, the federal government largely left the states to execute Covid-19 control plans individually….

Yesterday a panel of outside experts — formally known as the Vaccines and Related Biological Products Advisory Committee — and laypeople convened…

As pharmaceutical companies conduct phase 3 vaccine trials, air cargo transporters are cautious about the logistics involved in the mass distribution of…

Johnson & Johnson, one of four U.S. companies whose Covid-19 vaccine has advanced to the last phase of clinical trials, has hit…