Every flu season, injectable vaccines prime the immune system to produce antibodies that circulate through the bloodstream.

We're keeping an eye on new influenza and SARS-CoV-2 viral variants. Here's what we know about those viruses—and your immune ...

Memory cells in the nose slow the influenza virus as soon as it enters the body. They reduce viral levels and may help ...

Deep in the lungs, resident memory B cells stand guard against influenza reinfection—but whether they remain there may depend ...

Scientists have finally watched influenza viruses break into living human cells in real time, catching the microscopic invaders as they latch on, glide across the surface and slip inside. Instead of a ...

A different purpose has attracted attention for treating skin damage rather than simply preventing it. Dermcidin was ...

Many humans may already have some immunity to H5N1 bird flu, raising hopes that the virus could pose less of a threat than ...

Everything you need to know about the flu vaccine, including the nasal spray, egg-free options, who it’s free for and what to ...