What Are COVID “Human Challenge” Trials? Are They Ethical?
Volunteers in the UK will soon be deliberately infected with the coronavirus, and experts are divided over it. Here's why.
Explainers
Vaccines
Explainers
Your COVID Vaccine Questions, Answered
FAQs about the largest mass-vaccination campaign in US history.
Scopes
Getting a Flu Shot Is More Important Than Ever This Year
Flu season is coming and COVID isn't leaving. Widespread flu vaccination can help us handle dueling viruses. Will we rise to the occasion?
Explainers
Is the US Measles Crisis Almost Over?
We're not out of the woods yet. Here's a primer on why the contagious virus is back and what might happen next.
Explainers
Your Guide to the Flu Shot
Everything you need to know about flu vaccination, and then some.