Since December, the Wuhan coronavirus has killed at least 17 people and sickened close to 600. Here's an explanation of who is at risk.

A new flu vaccine protects mice against six different strains of the virus—and may have potential as a universal influenza vaccine.

Adenoviruses need one protein to unpack their DNA to infect human cells and without it, the infection fails. The finding could lead to new antivirals.

The first strain of flu virus we encounter during childhood sets the course of how our immune system responds to exposures later in life.

Scientists may have figured out why a universal flu vaccine has remained so elusive: our immune cells' faulty memory.

The first test of a Zika vaccine given before conception could support development of another vaccine in early trials in humans.

The right kind of antibodies can mobilize into a fighting force that can take on HIV, researchers report. The new work could lead to an HIV vaccine.

New research shows how a once-forgotten cellular structure fights in the "world’s oldest war," the battle between bacteria and viruses.

Gut microbes can tamp down or boost the severity of norovirus infection, depending on where along the intestine the virus takes hold.

This past summer, fear of eastern equine encephalitis gripped New England despite its relatively low impact. So why aren't more people scared of the flu?