CNN Health

In early 2020, as they tried to fight covid-19 across two rural counties in North Carolina, the staff of Granville Vance Public Health was stymied, relying on outdated technology to track a fast-moving pandemic.

If you test negative for Covid-19 but still have symptoms that appear to be Covid-related, CNN medical analyst Dr. Leana Wen explains what your symptoms could mean and what you should do next.

Less than half of infants globally are breastfed as recommended, and baby formula is in high demand despite failing to offer the same health and developmental benefits as breast milk, experts say. According to a new report, misleading claims and political influence are to blame.

A trio of codebreakers has found and deciphered a treasure trove of lost letters written by Mary, Queen of Scots.

The US Preventive Services Task Force has released a draft recommendation to screen everyone who is pregnant for hypertensive disorders of pregnancy, by monitoring their blood pressure throughout the pregnancy, and the group is calling attention to racial inequities.

Researchers have detected a previously unknown layer of partially molten rock beneath Earth's crust.

Climate change and antimicrobial resistance are two of the greatest threats to global health, according to a new report from the United Nations Environment Programme.

The timeless advice for couples about the importance of communicating when it comes to sex might be as old as the act itself.

Many millions of fungi are good for the environment, but a few hundred can cause disease in humans. However, the threat from fungal pathogens is increasing, experts say, and may grow much worse in a warmer, wetter and sicker world.

Respiratory viruses -- including the flu, RSV and the virus that causes Covid-19 -- are not a serious concern for most of the US public, even though they're still affecting many, according to new survey data from the Kaiser Family Foundation.

Neanderthals living 90,000 years ago in a seafront cave, in what's now Portugal, regularly caught crabs, roasted them on coals and ate the cooked flesh, according to a new study.

Jupiter already reigns as king of the planets — it's the largest one in our solar system. And now, the gas giant has the most known moons, too.

Patients with failing kidneys who need regular dialysis treatments still have sky-high rates of dangerous staph infections in their blood compared with people who don't need these treatments, according to a new Vital Signs report from the US Centers for Disease Control and Prevention. Rates of infection are particularly high among people who are Black or Hispanic or who have a lower socioeconomic status, the report said.

The idea that motherhood is linked with a decline in cognitive abilities may be wrong and unfair to moms, write a team of scientists in an article released in the journal JAMA Neurology.

People who have a healthy lifestyle before Covid-19 infection may have a lower risk of long Covid than their peers, a new study says.

The James Webb Space Telescope has observed its smallest cosmic object to date — a previously unknown asteroid about the size of the Colosseum in Rome.

Keeping alcohol consumption to one or two drinks a day lessened the odds of developing dementia, according to a study of nearly 4 million South Koreans.

It's now been half a decade since SpaceX turned heads around the world with its decision to launch Elon Musk's personal Tesla roadster into outer space, sending the car on an endless journey into the cosmic wilderness where it's expected to remain for millennia to come.

At Massachusetts General Hospital in downtown Boston, the hallways of the emergency department are lined with dozens of patients waiting to get a room upstairs.

On Monday, the US State Department's domestic offices, bureaus and posts overseas will begin communicating in a style that's unlike any other they've ever used before: The agency will ditch Times New Roman, a font it has been using since February 2004, and switch to the plainer Calibri.