CNN Health

There's a crisis in teen mental health, according to the CDC. These findings leave experts wondering whether the pandemic drove an increase in diagnosable mental health disorders in teenagers or if Covid-19 exacerbated the symptoms among teens.

A monkeypox outbreak continues to grow in countries where the virus isn't normally found, putting global health officials on high alert.

Scientists around the world are scurrying to reverse the hands of time. Here's a look at one lab's search for the fountain of youth, where old mice have grown young again.

A strange early relative of the giraffe was perfectly adapted for some serious headbutting 17 million years ago, according to new research.

Paxlovid, an antiviral treatment for Covid-19, was hailed as a game-changer in the pandemic thanks to its strong performance in lowering the risk of severe disease. Early supply challenges have been overcome in the United States, and the drug is perhaps more important than ever as case counts rise and more contagious variants spread amid stalled vaccination rates.

Americans entered Memorial Day weekend with the United States at five times the level of Covid-19 infection compared with this time last year. Cases continue to rise in most parts of the country, driven by the very contagious BA.2.12.1 subvariant. At the same time, many more people are returning to pre-pandemic activities.

Applying the lessons learned from the Covid-19 pandemic is key to preventing or preparing for the next one. Here's what public health experts and the public can do to help.

Pfizer and BioNTech announced Wednesday that they have completed their submission requesting emergency use authorization from the US Food and Drug Administration for their Covid-19 vaccine in children ages 6 months to 5 years.

More infant formula from abroad is on its way to the US as part of the government's Operation Fly Formula program, including shipments next week from the UK and Australia.

A ghost-like shell of a pig's heart, infused with beating human stem cells, is edging closer to human clinical trials for heart transplants.

Even as the US grapples with its most recent wave of Covid-19, new research suggests that variants on the horizon may keep case levels high.

The earthy, caffeine-infused coffee drink may hold more power than waking you up in the morning.

The world's largest living plant has been identified in the shallow waters off the coast of Western Australia, according to scientists.

Pride Month takes place each June and is an annual celebration of the LGBTQ community. Here's everything you need to know.

Advances in gene editing have brought us ever closer to fixing some of the most devastating diseases of our time, such as progeria and sickle cell disease.

The World Health Organization is now counting more than 550 monkeypox cases worldwide, the group's technical lead for monkeypox, Rosamund Lewis, said Tuesday on CNN International.

A slower walk as you age has always been a warning sign of increasing frailty that could lead to falls and other disabilities, experts say. Emerging research in small groups of elderly subjects has also found that a slower gait from year to year may be an early sign of cognitive decline.

Hillary Demmon has been reading the news about the nationwide formula shortage with horror. "I realized I have a deep freeze full of milk, and I'm still pumping," Demmon said. She decided to start pumping exclusively so she could donate to a local milk bank.

Neptune and Uranus are so similar that scientists sometimes refer to the distant, icy planets as planetary twins. But these ice giants have one big difference: their color.

Megalodon, the giant shark that lived more than 23 million years ago and was inspiration for the movie "The Meg," was almost four times bigger than the great white shark that cruises our oceans today.