Viruses

A mechanism known as “original antigenic sin” protects some people from flu. Whether it helps immune reactions to coronaviruses is still unclear

A new delivery method for certain vaccines could make the lifesaving treatments more effective and accessible

The pandemic has brought the nursing profession into crisis; the solution is in the public’s hands

A new book reveals how quiet scientists, big drug companies and the Trump administration raced to meet the COVID threat—and why kids are just now being considered for shots

The Merck pill, which could become the first oral antiviral COVID treatment, forces the coronavirus SARS-CoV-2 to mutate itself to death

Innate immunity might be the key to why children have fared better with the virus. But the Delta variant poses fresh unknowns

Pioneers of mRNA vaccines and next-generation sequencing techniques are among the winners of science’s most lucrative awards

After decades of disappointment there is a new flurry of vaccine activity 

Sequencing of the strain that has sickened hundreds in the wealthy Asian travel hub reveals some surprises 

Accelerated testing of compounds that have shown efficacy against the virus may lead to new drugs and vaccines

Like a steaming pile of lava or the soggy soil below a melting glacier, the freshly scrubbed hull of a ship is a magnet for new life.

The coverage of the Ebola outbreak in West Africa by U.S. media has often seemed unremittingly grim. So it was with some trepidation that I boarded a plane for Sierra Leone.