A new, small study finds a strong correlation between periods of high stress and an individual's hair going gray. But it also reveals how, in some cases, the graying process can be reversed, leading hair follicles to actually regain their prior pigments.
Three new studies released Monday are shedding new light on key questions about Covid-19 vaccines, including how long the immune response to vaccination lasts, whether it's effective to "mix and match" doses of different manufacturers' vaccines, and whether a third vaccine shot can effectively function as a booster.
Overall life expectancy in the United States dropped by almost two years between 2018 and 2020, the largest drop since 1943, according to a new BMJ study—and members of some racial and ethnic groups saw even greater declines. Explore the data on our interactive chart.
President Biden's proposal to create a new, $6.5 billion Advanced Research Project Agency for Health—which would aim to create revolutionary treatments for Alzheimer's, cancer, and more—was just added to a major bipartisan health care bill. But the Biden administration and Congressional Republicans appear split over a key detail of the agency's structure.