Jane Greenhalgh

Updated versions of the mRNA vaccines roll out this week. Experts say they offer good protection against current COVID variants. Who should get them, and when's the best time to roll up your sleeve?

The rate at which women in the U.S. are dying from pregnancy related causes more than doubled in recent decades. A new study, published in JAMA shows Black women and Native Americans are most at risk.

Much of the Northeast U.S. is blanketed in a murky haze of wildfire smoke. For most people breathing this air is unpleasant, for others it can be life-threatening. There are ways to reduce the risk.

Toxic metal can be harmful to developing brains. New lead targets are part of a broad FDA imitative to reduce children's exposure to the lowest levels possible.

The COVID-19 vaccine strategy may be shifting toward Americans getting yearly vaccinations, like many do with annual flu shots.

CDC Director Rochelle Walensky has signed off on updated versions of the Moderna and Pfizer-BioNTech vaccines that target the original virus and the omicron subvariants.

Americans' life expectancy dropped for the second year in a row and is the biggest drop since the 1920s. COVID-19 is driving the downward trend, according to CDC data.

Declaring a public health emergency can free up resources to help the administration respond to the monkeypox outbreak. So far more than 6,000 people in the U.S. have been infected.

Abbott, one of the largest formula-makers in the U.S., has reached an agreement with the government to bring a closed factory back on line. And the FDA is easing some restrictions on imported formula.

Health officials argue the protection of the COVID vaccine booster wanes over time and say some people need a second booster. But other infectious disease experts say three shots are enough for now.

People aged 50 and over could soon be eligible for a second Pfizer-BioNTech or Moderna COVID vaccine booster. The administration wants to offer the shots as immunity from the first booster is waning.

Those who contracted COVID-19 can end their isolation after five days while continuing to wear a well-fitting mask for an additional five days, according to the agency.

The Food and Drug Administration is expected to announce later this week that it is authorizing boosters for people 18 or older, even if they aren't at risk for severe disease.

Kids ages 5 to 11 will soon be able to get Pfizer's low-dose COVID vaccine. CDC director Rochelle Walensky agreed with a unanimous decision of a team of advisers that the benefits outweigh the risks.

Moderna submitted data from 344 volunteers who got a third shot of the vaccine six months after their first two doses. The additional shot significantly boosted immunity, the company said.

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.

The FDA amended its emergency use authorizations for the Pfizer and Moderna vaccines to allow for an additional dose for some immunocompromised people.

The CDC information dated Thursday gives new details on this variant of the coronavirus and says the agency should "acknowledge that the war has changed." It was first reported by The Washington Post.

The CDC says COVID-19 was the largest factor, along with drug overdoses, homicides, diabetes and chronic liver disease. The decline was even greater for Hispanic men.

The CDC released new estimates showing the highly contagious delta variant now accounts for more than 51% of cases in the U.S. In some parts of the country, the strain is responsible for 80% of cases.