Evusheld, a course of injected antibodies, helps protect people with weak immune systems for up to six months. The government is making it available through pharmacies and individual providers.

The roughly 7 million Americans who are immunocompromised — including many people with disabilities — live with much higher risk of COVID-19, and near-constant vigilance.

People with weakened immune systems who already got two doses of the Pfizer or Moderna COVID-19 vaccines can now get a third shot. But exactly who is eligible? Here's what we know so far.

For most people, COVID-19 vaccines promise a return to something akin to normal life. But for the hundreds of thousands of Americans who have a transplanted organ, it's a different story.

Scientists are looking at a possible link between the mutations in the U.K. and South Africa — and those in immunocompromised patients who are infected with COVID-19.