CNN Health

In the United States, approximately 658 million Covid-19 vaccine doses have been administered since they were first distributed exactly two years ago Wednesday.

Now that some children 6 months to 5 years old can get the new bivalent Covid-19 booster, CNN Medical Analyst Dr. Leana Wen is here to answer questions from parent and guardians. What are possible side effects? What if kids had Covid-19 already?

If concerns about potentially harmful ingredients have you wondering whether you should wear deodorant or antiperspirant, you should consider these factors, experts say.

Long Covid leaves some people with long-term symptoms, but it can be deadly, too. It played a part in at least 3,544 deaths in the United States in the first 30 months of the Covid-19 pandemic, a new report says.

The rates of mothers and newborn babies dying during pregnancy, at birth or postpartum are much higher in states that currently ban or restrict abortions than in states preserving access, according to a new report.

An experimental personalized mRNA vaccine in combination with the immunotherapy Keytruda reduced the risk of recurrence or death from melanoma in patients who had already had surgery, Moderna and Merck said Tuesday.

The flu season ramped up early in the United States this year, but vaccination rates are far from keeping pace.

The battle against the single-use plastic bag may not be won but it's definitely under way.

The Covid-19 vaccines have kept more than 18.5 million people in the US out of the hospital and saved more than 3.2 million lives, a new study says -- and that estimate is most likely a conservative one, the researchers say.

For the first time, a new gene editing technology called base editing was used to modify immune cells and successfully treat a teen with treatment-resistant leukemia. A month afterward, 13-year-old Alyssa was in remission, and she continues to do well several months later.

It's late, dinner is just now on the stove, your phone is ringing, and your child's tantrum begins. A little screen time almost always works to calm them down.

Tim Buck knows by heart how many people died from drug overdoses in his North Carolina county last year: 10. The year before it was 12 — an all-time high.

Scarcity of several high-profile prescription drugs, such as the antibiotic amoxicillin and the ADHD treatment Adderall, have had some patients searching pharmacies and rationing pills, and now parents in some areas are having to hunt to find over-the-counter pain- and fever-reducing medications for their sick kids.

Among foods that spark a strong reaction, anchovies are at the top of the food chain.

Resting at the bottom of Mjøsa, the largest lake in Norway, a shipwreck from hundreds of years ago is in almost perfect condition, frozen in time.

The Artemis I mission — a 25½-day uncrewed test flight around the moon meant to pave the way for future astronaut missions — came to a momentous end as NASA's Orion spacecraft made a successful ocean splashdown Sunday.

Discount grocer Lidl is recalling a chocolate advent calendar made by Favorina after testing found that some may be contaminated with salmonella bacteria.

Flu, RSV and other respiratory viruses have been spreading among children, and that has put a strain on hospitals, but also doctors' offices, pharmacies, families and caretakers.

Whether you're feeling ambitious, overwhelmed, sugar-rushed or a combination of all these feelings, cookbook author Irving Lin has expert ways to make it a delicious cookie season. Here are his tips for working your way through holiday cookie recipes.

The US Food and Drug Administration is falling down on the job of policing online tobacco retailers, according to a highly critical new report from the US Department of Health and Human Services' Office of Inspector General.