Disease and Illnesses

Currently accessible Covid-19 vaccines seem to protect people against the emerging variants so far.

What Experts Know About the Current Coronavirus Variants

The appearance of highly transmissible versions of the pandemic coronavirus has the world's medical community on high alert

A volunteer donates blood during an event at the Field Museum in Chicago in May, 2020.

What Scientists Are Learning About Covid-19 Using the Nation's Blood Supply

Labs and blood banks collect millions of blood samples each month, offering a distinctive source of data on the disease

Mask wearing and other behaviors developed during the Covid-19 pandemic are largely keeping flu cases low this year.

How Covid-19 Precautions Have Kept Flu Cases Low

By this time last year, the U.S. had recorded over 65,000 cases of influenza

Toxoplasma gondii grows in tissue cysts which can stick around in the body after illness has passed

Parasite Found in Undercooked Meat and Cat Poop May Be Linked to Rare Brain Cancer

The U.S. sees about 24,000 brain cancer cases annually, compared to 30 million cases of Toxoplasma gondii, so an individual’s cancer risk is low

(Top row) Jing Liu and Florian Idenburg, Barron Ryan, Arturo Elizondo, (middle row) Samantha Pratt, Gitanjali Rao, Anitra Belle Henderson, (bottom row) Kennyjie, Andrea Ponti and Brett Phaneuf

Ten Innovators to Watch in 2021

These visionaries are imagining an exciting future with chicken-less eggs, self-piloting ships and more

A COVID testing site at Echo Park Stadium on December 30, 2020 in Parker, Colorado. This site is nearby Ebert County, where the first case of a COVID-19 variant that is thought to be more contagious was detected in the United States.

Colorado and California Report First U.S. Cases of Highly Contagious Covid-19 Variant

First discovered in England, the variant appears to be more transmissible but does not cause a more severe case of the disease

An RN administers the Covid-19 vaccine to a nurse at the Virginia Hospital Center in Arlington, Virginia.

The Ten Most Significant Science Stories of 2020

From the rapid development of vaccines for Covid-19 to the stunning collection of an asteroid sample, these were the biggest science moments of the year

“He is setting a fine example for the youth of the country,” said a public health official after the King of Rock 'n' Roll received a vaccine on the set of “The Ed Sullivan Show” in October 1956.

How Elvis Helped America Eliminate Polio

The rock star's much-publicized vaccination inspired reluctant U.S. teens to get inoculated

The survey did not conclude how the wild mink became infected with the virus, but it’s not unusual for captive minks to escape fur farms. (Infected mink not pictured.)

First Case of Covid-19 in a Wild Animal Found in a Utah Mink

The U.S. Department of Agriculture detected the infection while testing wild animals around a mink farm with a Covid-19 outbreak

A nurse administers the Pfizer-BioNTech COVID-19 vaccine to a patient in London on December 8. Some experts say the fastest way to test second-generation COVID-19 vaccines is through human challenge trials.

A Brief History of Human Challenge Trials

For more than two centuries, scientists have been intentionally infecting patients with dangerous diseases in order to learn more

Chimps relax at the Sweetwaters Chimpanzee Sanctuary at Ol Pejeta Conservancy in Kenya. Humans can transmit many diseases to chimps, orangutans and their kin.

How Researchers Are Protecting Great Apes From Covid-19

Humans who study and care for the primates are taking precautions to prevent the spread of the coronavirus and its unknown effects

Henry Bergh (in top hat) stopping an overcrowded horsecar, from Harper’s Weekly, Sept. 21, 1872.

The Horse Flu Epidemic That Brought 19th-Century America to a Stop

An equine influenza in 1872 laid bare how essential horses were to the economy

Trench fever came to prominence during World War I, but new research suggests that the disease afflicted people long before the 20th century.

Before WWI, Trench Fever Plagued the Ancient Romans and Napoleonic Soldiers

Long associated with the Great War, the disease actually dates back at least 2,000 years, a new study suggests

In February, the Covid-19 pandemic halted polio immunization campaigns across Afghanistan and Pakistan, fueling a new resurgence of polio in children. Here, a young girl is given the polio vaccine in the Kabul Province in October after campaigns were resumed.

How Covid-19 Drove New Polio Cases in Afghanistan

Due to the pandemic, a total of 50 million children did not receive the polio vaccine in Afghanistan and Pakistan

According to the World Health Organization, some 42 "candidate vaccines" against the coronavirus that causes Covid-19 are undergoing clinical trials.

What Is the Best Strategy to Deploy a Covid-19 Vaccine?

Mathematicians are modeling different scenarios for a vaccine rollout to see what may work best

An American dog tick (Dermacentor variabilis) on a human finger.

Higher Temperatures Make Some Ticks Pick Humans Over Dogs

The study’s results suggest certain tick-borne diseases could become even more prevalent as climate change heats up the planet

But since 2010, the percentage of children around the world receiving the first vaccine has plateaued at around 85 percent; only 71 percent receive the second dose.

A Resurgence of Measles Killed More Than 200,000 People Last Year

Public health experts worry that vaccine availability will be further stalled by the Covid-19 pandemic

Reconstruction of a titanosaur with ulcerations

First Evidence of Parasites in Dinosaur Bones Found

A team of paleontologists used CT scans and tissue samples to uncover blood pathogens in an infected titanosaur

Electron microscope image of a human cell (purple) heavily infected with SARS-CoV-2 virus particles (yellow)

Will the Coronavirus Evolve to Be Less Deadly?

History and science suggest many possible pathways for pandemics, but questions remain about how this one will end

An illustration of Legionella bacteria, the cause of Legionnaires' disease

Why Reports of Legionnaires' Disease Are on the Rise in the United States

Though less common than in the past, Legionella bacteria and other dangerous pathogens still lurk in drinking water

Page 14 of 37