Moderna's is over 90%. Johnson & Johnson's is only 66%. We spoke to experts about what these numbers mean

Smallpox vaccinations seem to help prevent monkeypox. Yet they've rarely been given since smallpox was eradicated

Researchers hope to create a model system to better understand ecology of viruses, including coronaviruses

Like previous COVID waves, omicron has largely bypassed much of Africa — or has it?

The idea that SARS-CoV-2 escaped from a lab shouldn’t be dismissed as quackery. A zoo analogy helps illustrate why

J.K. Rowling says "breathing exercises" helped her beat COVID-19. Here's what experts say

Wild birds like pelicans and ducks are dying from a new strain of avian influenza that has spread to farm animals

For months, Fauci endured calls to resign in protest, but it's good he didn't — now he can shape vaccine policy

The year 2020 arrived with so much promise. Too bad it went all downhill. Here's how I plan to survive the lunacy

Public health workers are building on lessons learned during the outbreak of measles in 2019

“This is absurd and will not protect you,” Arizona State University epidemiologist Matthew Scotch warns

So-called "silent spreaders" aren't being tested — and that's a huge problem for public health

Experts say irregular period side effects are a result of under-representing women in clinical vaccine trials

Without herd immunity, life will never quite return to a pre-pandemic "normal"

Assertions by pharmaceutical company executives have created pressure for scientists and politicians to take action