Disease and Illnesses

Children play in a spray pool in Rio de Los Angeles State Park in Los Angeles, California, on Thursday, June 6. A heat wave led to record-setting temperatures across the western U.S. last week.

The Western U.S. Is Sweltering Under a 'Heat Dome.' What Does That Mean?

A stagnant high-pressure system over the region is trapping heat, exacerbating high temperatures and setting records

Chickens on a poultry farm in Tepatitlan, Jalisco State, Mexico, on June 6, 2024. Outbreaks of H5N2 avian influenza have recently been reported in poultry in Mexico.

Man Infected With H5N2 Bird Flu in Mexico Dies. Here's the Latest on the Virus

The strain is not the same one that has infected U.S. cows and three dairy farm workers, and officials say the risk to the general public remains low

The correspondence is undated, but experts think Kafka wrote it in the spring of 1920.

An Ailing Franz Kafka Curses Writer's Block in This Handwritten Letter to a Friend

"I haven't written anything for three years," he admitted in the note, which will go to auction this summer

Laboratory testing found live Trichinella larvae in black bear meat that had been frozen for 110 days.

Family Members Infected With Parasitic Worms After Eating Undercooked Bear Meat at Reunion

Six people developed symptoms of roundworm infection after consuming grilled black bear meat and vegetables in July 2022, and all have since recovered

Acorns cover the forest floor.

Why Do Trees Drop So Many Seeds One Year, and Then Hardly Any the Next?

A new paper suggests that plants may use slow seed years to prevent the spread of disease

The Black Death killed tens of millions of people in the mid-1300s, but scientists and historians are still trying to figure out how it spread.

Did Body Lice Spread Bubonic Plague? Research Suggests the Parasites Are Better Vectors Than Thought

These blood-sucking insects are capable of transmitting the bacteria that caused the Black Death, according to a laboratory study

Color-enhanced transmission electron microscope images of adenovirus, which is a common cause of respiratory illnesses. Researchers identified adenovirus remnants, as well as herpesvirus and HPV, in Neanderthal remains in a new study.

50,000-Year-Old Neanderthal Bones Have Remains of Human Viruses, Scientists Find

The preliminary analysis is a first step in testing the theory that infectious diseases played a role in Neanderthals' extinction

Rangers clear deceased birds from Staple Island in England, where avian flu had a devastating effect on a seabird colony.

Four Important Questions About Bird Flu, Answered

The virus has killed tens of millions of birds and infected hundreds of species of animals, including dairy cattle in the United States. Here’s what you should know about it

Teal Helms (right) and volunteer Gali Begim (left) perform intake assesments on a brown pelican at the Wetlands and Wildlife Care Center in Huntington Beach, California.

Hundreds of Starving Brown Pelicans Are Turning Up on California Beaches, Puzzling Wildlife Rescuers and Scientists

By all available accounts, there isn’t a lack of ocean forage

Human-caused biodiversity loss is a major factor that could contribute to more frequent and severe disease outbreaks, according to a new study.

Biodiversity Loss Increases the Risk of Disease Outbreaks, Analysis Suggests

Researchers found that human-caused environmental changes are driving the severity and prevalence of disease, putting people, animals and plants at risk

A portrait of Ludwig Van Beethoven by Joseph Karl Stieler, painted in 1820.

Locks of Beethoven's Hair Are Unraveling the Mysteries of His Deafness and Illnesses

Researchers found high levels of lead, mercury and arsenic in the German composer's hair, which may help explain some of his many ailments

An MRI of a brain of a person with Alzheimer's disease. A new study suggests having two copies of a genetic variant called APOE4 is a cause of the disease, not just a risk factor for it.

Almost All People With Two Copies of This Genetic Variant Develop Signs of Alzheimer's Disease, Study Finds

The research focused on a variant called APOE4 and largely looked at people of European ancestry—risk levels are different for other groups, the authors say

Previous research had found leprosy in modern red squirrels, and genetic analysis suggested the strain was closely related to leprosy found in medieval humans.

Medieval Squirrels and Humans May Have Spread Leprosy Back and Forth

Archaeologists uncovered evidence of leprosy in a medieval red squirrel in England, and DNA evidence revealed the strain was similar to what was circulating in humans at the time

Previous research suggested that anger can increase people's risk of heart attacks. In the new study, researchers found that part of the reason why could be that anger briefly reduces blood vessels' ability to widen.

Can Anger Affect Your Heart Health? Scientists Find the Strong Emotion Impacts How Blood Vessels Function

The results could even help explain why stress from anger may trigger a heart attack

Josefina "Joey" Guerrero (third from right) received the Medal of Honor With Silver Palm for her actions during World War II, which were “instrumental in saving the lives of many Americans and Filipinos,” according to the award citation.

This Filipina Spy Used Her Leprosy as a Cover to Thwart the Japanese During World War II

Enemy soldiers overlooked Josefina "Joey" Guerrero due to her condition. Later, her heroic actions on behalf of the Allies were largely forgotten

Experts say the pasteurization process likely kills the virus, and tests are likely just detecting remnants of the dead virus.

One in Five Milk Samples Has Bird Flu Virus Fragments, Suggesting Cow Infections Are More Widespread Than Thought

The research has not yet found evidence that milk contains infectious virus, and the FDA says the commercial milk supply is safe

Doctors perform a pig kidney transplant on April 12. So far, the patient is recovering well, but doctors will need to continue to monitor her in the hospital and make sure her immune system doesn't reject the transplanted organ.

Second Patient Receives Gene-Edited Pig Kidney Transplant in Breakthrough Surgery

The woman, 54-year-old Lisa Pisano, also received a mechanical heart pump implant days earlier, making her the first person to undergo both procedures

Bird flu was first detected in U.S. dairy cows in March. So far, infections have been detected in 33 herds across eight states.

Bird Flu Virus Detected in Pasteurized Milk, as U.S. Moves to Test More Dairy Cows

The FDA maintains that the commercial milk supply is safe, and it plans to report results of further tests in the coming days and weeks

A rarely diagnosed medical condition causes gut microbes to produce alcohol inside the body.

This Rare Condition Makes Some People Get Drunk, Even When They Haven't Touched a Drop of Alcohol

A man in Belgium was acquitted of drunk driving charges this week, after doctors showed he has auto-brewery syndrome, which makes his body produce alcohol

Karl Friedrich Hieronymus, the real Baron Münchhausen, was a retired German officer who fought with a Russian regiment in two campaigns against the Ottoman Empire.

The 18th-Century Baron Who Lent His Name to Munchausen Syndrome

The medical condition is named after a fictional storyteller who in turn was based on a real-life German nobleman known for telling tall tales

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