Viruses

Researchers extracting an ice core from the Guliya Ice Cap in the Tibetan Plateau in 2015.

Scientists Extract 15,000-Year-Old Viruses From Tibetan Glacier

Researchers say the ancient pathogens are unlikely to cause humans any harm, but 28 out of the 33 viruses found are new to science

This transmission electron microscopic image shows the pandemic coronavirus SARS-CoV-2.

Over 20,000 Years Ago, a Coronavirus Epidemic Left Marks in Human DNA

The oldest modern coronavirus is about 820 years old, but humanity has been fighting similar viruses for millennia

Officials at the U.S. Centers for Disease Control and Prevention anticipate that Delta will become the dominant variant in the United States within the next few months.

Covid-19 Delta Variant Emerges as Primary Threat Around the World

A surge of cases in the United Kingdom suggests that Delta is the most transmissible variant yet identified

Minute Molecular, the company developing the device, has high hopes for it as an efficient and accurate means of testing people at schools, workplaces and sports stadiums.

This Compact PCR Test for Covid-19 Could Give Accurate Results in 15 Minutes

The speed and ease of the DASH testing platform would be a boon for screening efforts

Microscope image of an isolate from the first U.S. case of Covid-19. Viral particles are visible in blue.

WHO Releases Results of First Investigation Into the Origin of Covid-19

The virus was most likely first spread from a wild animal, possibly bats, to an unknown intermediate animal, possibly farm animals, and then to humans

AstraZeneca's vaccine is approved for use in over 20 countries.

Why U.S. Approval of the AstraZeneca Covid-19 Vaccine Is Taking So Long

An unprecedented public exchange with a data review board is the latest of AstraZeneca-Oxford vaccine’s hurdles

Since scientists haven’t yet found evidence that the vaccines provide mucosal immunity, someone who is vaccinated and has no symptoms of illness may be carrying the live SARS-CoV-2 virus and spreading it to others when they cough, breath or sneeze.

Why It's Important to Still Wear a Mask After Covid-19 Vaccination

Vaccinated people should still wear masks around unvaccinated individuals to prevent transmission

An analysis of the genome of the B.1.1.7 variant of the coronavirus overlaid on the CDC's map of different states' genome sequencing rates. Darker-shaded states have processed more genomes (relative to their total case count) than lighter, greener states.

Why the U.S. Is Struggling to Track Coronavirus Variants

A scattered and underfunded effort at genomic sequencing has hindered the country’s ability to detect different forms of the virus

Signals from smartwatches can help catch infections early.

Can Smartwatches Be Adapted to Help Detect Covid-19 Infections?

With new algorithms, wearable devices—collecting vital signs like heart rate and skin temperature—could catch illness early

Intense visions and confusion about the reality of hospitalization can be especially scarring, leaving patients with intrusive thoughts, flashbacks and vivid nightmares. If such responses persist for more than one month and cause functional impairment or distress, it may be diagnosed as PTSD.

Why PTSD May Plague Many Hospitalized Covid-19 Survivors

Scientists warn about the likelihood of post-traumatic stress disorder for patients discharged from the intensive care unit

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

The vaccination effort underway is the biggest in United States history.

Distribution Begins for First Covid-19 Vaccine Authorized in the United States

Pfizer-BioNTech’s vaccine received emergency use authorization from the FDA last week

Children who have been infected with the virus often experience mild or no symptoms at all, making them less likely to get tested.

More Than 1 Million U.S. Children Have Had Covid-19 Since the Start of the Pandemic

Almost 112,000 children tested positive during a one-week period ending on November 12, the largest single week increase in coronavirus cases in kids

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

As countries in the Northern Hemisphere enter flu season, experts are looking to patterns from Southern Hemisphere nations as a source of cautious optimism.

What to Expect When Covid-19 and the Flu Season Collide

Experts weigh in on the necessary steps to ensure a mild flu season during the pandemic

The discoveries of these three Nobel laureates “saved millions of lives worldwide,” one Nobel committee member said.

Nobel Prize in Medicine Awarded to Three Scientists Who Discovered Hepatitis C

The contributions of these Nobel laureates helped identify, test, and treat hepatitis C

Woodrow Wilson, seen here at the start of the Paris Peace Conference in January 1919, never publicly acknowledged the pandemic's toll on his country.

What Happened When Woodrow Wilson Came Down With the 1918 Flu?

The president contracted influenza while attending peace talks in Paris, but the nation was never told the full, true story

University of Arizona leaders were able to prevent a potential Covid-19 outbreak by testing wastewater.

University of Arizona Stops a Covid-19 Outbreak by Following the Feces

After wastewater monitoring detected the virus in a dorm’s sewage, the school discovered and quarantined two asymptomatic infections

Commuters wearing face masks walk to work in Tokyo on April 7.

How a Japanese Museum Is Documenting Life During Covid-19

New exhibition features everyday objects that would have been unfamiliar before the pandemic

A customer talks to a waiter in a mask while eating his meal at a table divided with transparent panels in Bangalore, India.

What Scientists Know About Airborne Transmission of the New Coronavirus

Aerosol experts, from engineers to doctors, weigh in on the ability of tiny droplets to transmit the virus that causes COVID-19

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