The next big advance in treating diseases like rheumatoid arthritis could be tiny pulses of electricity delivered to the vagus nerve.

(Image credit: Sebastian Kaulitzki/Science Photo Library RF)

At a recent medical gathering, researchers presented their latest hypotheses about what causes – and what could treat – the lingering disease.

The singer repeatedly postponed performances in the past year because of severe muscle spasms. In a tearful Instagram post, she revealed she has been diagnosed with a rare neurological disorder.

(Image credit: Rich Fury)

When Knut the polar bear was rejected by his mother at the Berlin Zoo, a debate caught fire over whether it was more humane to keep him alive or euthanize him. Today, as the Fed raises interest rates again, another polar bear is in danger: The economy.

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The actor said he suffered from hearing, vision and balance issues and that it took him an entire year to recover from the autoimmune condition that causes the swelling of blood vessels.

(Image credit: Robin L Marshall)

Writer Meghan O'Rourke says long COVID-19 and other chronic illnesses put a heavy burden on patients, who have to "testify to the reality of their own illness." Her new book is The Invisible Kingdom.

(Image credit: Fanatic Studio)

Scientists have begun to find abnormalities in the immune systems of some long-COVID patients that might help explain the syndrome, at least in some people. But there is still much more to learn.

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.

(Image credit: Christiana Botic)

A league of unfortunate writers had their books come out in the height of the coronavirus crisis — there are even several online support groups for authors who published mid-pandemic.

Jennifer Minhas is among those who suffer lingering problems after COVID-19. A diagnosis of POTS, a little-known circulation disorder that mostly affects women, offers a way forward.