CNN Health

The CDC estimates that XBB.1.5 has more than doubled its share of the Covid-19 pie each week for the last four, rising from about 4% to 41% of new infections over the month of December.

In just five years, the number of small children in the US exposed to cannabis after accidentally eating an edible rose 1,375%, a new study says.

Tennis superstar Martina Navratilova is starting treatment for stage I throat cancer and breast cancer this month, according to her agent.

The US Food and Drug Administration could decide this week whether to grant accelerated approval to the experimental dementia drug lecanemab, according to Eisai and Biogen, the companies that make the drug.

You may know that being adequately hydrated is important for day-to-day bodily functions such as regulating temperature and maintaining skin health.

Sesame has joined the list of major food allergens defined by law, according to the US Food and Drug Administration.

Here are the top three science-based ways to improve your health and live a longer, disease-free life.

Taking a 'Dry January' break from alcohol can reward you with better sleep, more energy, a better mood and better overall health. Here's expert advice on how to go dry successfully.

When creating New Year's resolutions, it's important to have fun while planning for emergencies. Here are an expert's five favorite science-based tips for sticking to your resolutions.

New Year's Day is often accompanied by that dreaded morning aftermath — a hangover. Learn what experts say can help — or hurt — a hangover.

With parties, weddings and overdue catch-ups in full swing again, the pressure drink socially is back. Millie Gooch, founder of the Sober Girl Society, is pushing back with practical advice to help young women who want to have fun but not drink so much.

This year was full of moments that remind us why we look at the stars and dig into the past.

Find out how to prevent a hangover — or at least keep that morning-after misery to a minimum. Experts say there is only one true preventive — or cure — for a hangover: Don't drink.

Stunning meteor showers, full moons and eclipses will light up the sky in 2023.

Seasonal flu activity remains high in the United States but continued to decline in most areas last week, leading up to Christmas, according to data published Friday by the US Centers for Disease Control and Prevention. The numbers do not include flu activity from after the holiday.

Your phone doesn't even need to ping to distract you. There's good evidence the mere presence of it is enough to divert your attention. So what's going on? More importantly, how can you reclaim your focus without missing the important stuff?

The expertise and availability of coroners, who determine cause of death in criminal and unexplained cases, varies widely across the country.

As the world enters a new year, many public health and infectious disease experts predict that monitoring for new coronavirus variants will be an increasingly important part of Covid-19 mitigation efforts -- and some are turning their attention to a surge in cases in China.

The tree of life grew in 2022 as California Academy of Sciences researchers and their international collaborators discovered 146 new animal, plant and fungi species.

A congressional investigation found that the US Food and Drug Administration's "atypical collaboration" to approve a high-priced Alzheimer's drug was "rife with irregularities."