Disease and Illnesses

Alzheimer's disease is the most common form of dementia.

U.S. Dementia Cases Are Poised to Rise to One Million Each Year by 2060, According to New Projections

As the American population ages, a new study finds the average lifetime risk of dementia for adults over 55 is around 42 percent—a higher rate than previously thought

U.S. Surgeon General Luther Terry shocked Americans by announcing that cigarette smoking is a major cause of lung cancer, throat cancer and chronic bronchitis.

When the U.S. Surgeon General Shocked Americans by Announcing That Smoking Kills

The 1964 disclosure marked the first time many smokers had heard about the health dangers of tobacco

The world’s first Covid-19 human challenge study was born in early 2021.

What Have We Learned From Intentionally Infecting People With Covid-19?

Challenge trials help researchers study immune responses. Skeptics still doubt the approach is worth the risks

Jimmy Carter tries to comfort 6-year-old Ruhama Issah at Savelugu Hospital in Ghana as a Carter Center technical assistant dresses Issah's Guinea worm wound. In May 2010, Ghana reported its last case of Guinea worm disease and announced it had stopped transmission a year later.

Jimmy Carter Worked to Eradicate the Vicious Guinea Worm Parasite, Slashing Cases by the Millions

The 39th U.S. president aimed to quash the debilitating water-based infection before he died. Through the Carter Center's work, he came tantalizingly close, lowering the number of yearly cases from 3.5 million to just 14

The U.S. has reported 66 human cases of H5N1 bird flu since March 2024, but a recent death of a Louisiana resident marks the country’s first fatality from the virus.

Officials Report the First Human Death From Bird Flu in the U.S. Here's What to Know About the Virus

The death of a Louisiana resident who was over the age of 65 signals that future H5N1 infections are not guaranteed to be mild, health experts say

From these upper hip bones, researchers extracted an ancient genome of the bacteria that causes syphilis.

Ancient DNA Offers Crucial Hints to the Origin of Syphilis, a Decades-Long Mystery That Has Divided Scientists

Researchers found evidence that early versions of syphilis-causing bacteria existed in the Americas long before the arrival of Columbus

Stories in a wide variety of scientific disciplines made our list this year.

The Ten Most Significant Science Stories of 2024

From a total solar eclipse that captivated our continent to record temperatures that scorched the planet, these were the biggest moments of the year

Towana Looney's surgery at NYU Langone Health lasted seven hours and involved dozens of medical professionals.

An Alabama Woman Got a Gene-Edited Pig Kidney Transplant. Three Weeks Later, She Has 'Never Felt Better'

On November 25, 53-year-old Towana Looney became just the third living person to receive a pig kidney in an experimental procedure

Fat tissue, as seen here under a scanning electron micrograph, maintains a "memory" of obesity, new research suggests.

Fat Cells Retain a 'Memory' of Obesity, Making It Hard to Lose Weight and Keep It Off, Study Suggests

Obesity leads to DNA alterations that affect gene activity and linger after weight loss, a finding that researchers say could help reduce stigma around the disease

Sierra Nevada yellow-legged frogs are rebounding from near-extinction in California.

Endangered Sierra Nevada Yellow-Legged Frogs Are Making a Comeback

Scientists are celebrating the recovery of the species in Yosemite National Park, where they were decimated by the introduction of non-native fish and the deadly amphibian chytrid fungus

Sugar exposure during the first 1,000 days after conception is linked with type 2 diabetes and hypertension later in life, according to a new study.

How Sugar Rationing During World War II Fended Off Diabetes and High Blood Pressure Later in Life

Babies who were conceived and born during the period of rationing in the United Kingdom were less likely to develop certain diseases as adults, a new study finds

A new study suggests that among adolescents mental health disorders could be “socially transmitted,” though its researchers could not establish any direct cause.

Is Depression Contagious?

The science about whether mental health conditions can spread socially is uncertain, but exposure to an affected peer can drive awareness

Overall, the findings of a new survey suggest Americans are more scared in general than they have been in recent history.

These Are Americans' Biggest Fears in 2024, as the Country Is 'Becoming More Afraid'

Government corruption, loved ones becoming ill or dying, cyberterrorism and nuclear weapons topped the list of Chapman University's annual survey

Scurvy, or vitamin C deficiency, is easy to treat with supplements and dietary changes.

Is Scurvy Making a Comeback? Two Recent Cases Highlight How the Illness Can Appear in the Modern World

Scurvy diagnoses in Australia and Canada suggest doctors should consider testing for vitamin C deficiency in patients experiencing poverty, food insecurity and social isolation

A pregnant mother’s mental wellness can impact her child’s future physical, mental and behavioral health

Can a Mother’s Mental Health Impact a Baby in the Womb?

Growing research indicates a pregnant woman’s stress level and overall mental well-being can affect fetal and child development, yet access to prenatal mental health care remains inadequate

View from the researchers' airplane flying over Japan

Scientists Have Found Bacteria and Fungi 10,000 Feet Up in the Air

The discovery has implications for human health, since the microbes included some that were still viable, some that could be infectious to humans and others that carried drug-resistant genes

Health officials say there is an elevated risk for Eastern equine encephalitis infections in New England this year. Wearing insect repellant, covering skin outdoors and staying indoors between dusk and dawn can help prevent infection.

New Hampshire Resident Dies From Rare but Serious Mosquito-Borne Illness

It's one of four cases of Eastern equine encephalitis reported in the U.S. so far this year—and the state's first since 2014

The new research tested the drug liraglutide, marketed as the diabetes treatment Victoza. Liraglutide and the active substance used in the weight-loss treatment Wegovy are both GLP-1 agonists, used to lower the risk for heart disease, stroke and kidney disease.

Weight Loss and Diabetes Drug Could Slow Alzheimer's Progression, Preliminary Study Suggests

In a year-long trial, people who received a daily injection of liraglutide showed an 18 percent lower cognitive decline than people who received a placebo

A colorized transmission electron micrograph of monkeypox virus particles. There have been 15,600 mpox cases and 537 deaths reported in the Democratic Republic of the Congo in 2024 so far.

WHO Declares Mpox Global Health Emergency. Here's What to Know

A new virus strain has been spreading primarily the Democratic Republic of the Congo, as well as nearby countries that had previously not reported mpox cases

The findings build on research from last year, which found that people with higher levels of the sweetener in their blood were at a greater risk of heart attacks and strokes.

Common Artificial Sweetener Linked to Increased Heart Attack Risk in Small Study

Healthy people who consumed 30 grams of the sweetener erythritol had an increased risk of blood clot formation, while people who consumed the same amount of glucose did not

Page 1 of 39