Viruses

People with long Covid sit in the audience at a U.S. Senate hearing about the condition on January 18.

Scientists Find Indicators in Blood Linked to Long Covid, Hinting at Future Treatments

One part of the immune system appeared to be overly active in long Covid patients in a small study, a finding researchers hope could help diagnose or treat the condition

Temperature varies from person to person and it differs throughout the day.

What's Really the Average Human Body Temperature?

Long thought to be 98.6 degrees Fahrenheit, the measurement is highly personal and varies depending on time of day, among other factors, new research finds

A photo from the announcemnent of this year's Nobel Prize in Physiology or Medicine. The researchers discovered a way to edit synthetic mRNA so that it could pass by cells' defense mechanisms, allowing it to be used in Covid-19 vaccines.

Nobel Prize in Medicine Honors Two Scientists Who Enabled mRNA Vaccines

Katalin Karikó and Drew Weissman discovered a way to edit mRNA so it could be used in vaccines without getting attacked and destroyed by the body

A new round of Covid-19 vaccinations was recommended by Centers for Disease Control and Prevention advisers on Tuesday.

What to Know About the New Covid-19 Vaccines, Now Recommended by CDC Advisers

Experts say the latest boosters are effective against emerging variants including EG.5.1 and BA.2.86

Covid-19 cases are on the rise in the U.S., but experts say it is not unexpected.

Covid-19 Hospitalizations Show an Uptick in the U.S. but Remain Low

Since the end of the nation's public health emergency for the virus, hospitalizations are one of the best available indicators of trends in case totals

The research team stands alongside the SARS-CoV-2 wet cyclone aerosol sampler they developed.

New Device Can Detect Covid in the Air Within Five Minutes

Researchers report the technology is 77 to 83 percent accurate in finding any of the coronavirus variants in a room

Craig's closet was unveiled at St. Vincent's Triangle earlier this month.

New Sculpture Comes to New York City's AIDS Memorial Park

"Craig's closet" stands near the former site of St. Vincent's, a hospital at the center of the city's AIDS epidemic

A medical professional prepares a Covid-19 booster shot in Freeport, New York, on November 30, 2021.

Fall Covid-19 Boosters Should Target New Variants, FDA Advisers Say

The shots would no longer take aim at the virus's original strain, which experts say is not likely to return

Because moose are largely solitary, it's unlikely a rabies outbreak will occur in Alaska's population, according to officials.

First Rabid Moose Recorded in Alaska Was Stumbling Through a Town

The large mammal likely contracted the virus from a fox, say wildlife officials

With wingspans of up to nine feet, California condors are the largest birds in North America.

Bird Flu Vaccine Approved in Emergency Effort to Save California Condors

The virus has set back the endangered birds' recovery, but a newly hatched chick is flu-free and being raised by veterinarians

An electron micrograph of the respiratory syncytial virus (RSV), which kills an estimated 160,000 people worldwide each year.

First RSV Vaccine for Older Adults Approved in U.S.

The shot to combat the potentially deadly virus could be available in the fall, pending a green light from the CDC

A sign for Covid-19 testing in New York City on March 9, 2023.

As Public Health Emergency Ends, CDC Will Stop Tracking Community Levels of Covid-19

The agency will continue to monitor cases of the virus based on hospitalizations and wastewater testing

California condors are the largest birds in North America.

Twenty Endangered California Condors Die Amid Avian Flu Outbreak

Scientists fear the deaths could set back the slow-breeding birds' recovery by at least a decade

A pharmacist delivers a Covid-19 booster shot in Chicago during a clinic for seniors.

When Should I Get Another Covid Booster?

Here’s what you need to know about getting your next vaccine

An analysis of genetic samples taken in 2020 from a market in Wuhan, China, found both the coronavirus and raccoon dog DNA.

Genetic Evidence Ties Covid's Origin to Raccoon Dogs

New data support the theory that the virus causing Covid-19 first spread to humans from animals

A worker catches chickens at a market in Cambodia, where a girl recently died from avian influenza.

Bird Flu Causes the Death of an 11-Year-Old in Cambodia

A father and daughter both contracted avian influenza, the first cases in the country since 2014

Climate change, pollution and biodiversity are all contributing to the rise of drug-resistant super bugs.

'Superbugs' Could Kill Up to Ten Million Additional People Each Year by 2050

A new U.N. report warns that climate change, pollution and biodiversity loss are helping create pathogens that can evade our medications

Personnel bury pelicans that may have died from avian flu in Lima, Peru, on December 7, 2022. At least 585 seals and 55,000 birds have been found dead in Peru, likely due to avian flu.

As Bird Flu Spreads to Mammals, Health Officials Urge Caution

Transmission between minks has called attention to the potential risks to humans, though experts say not to panic

A grizzly bear in Glacier National Park in Montana

Three Grizzly Bears Tested Positive for Avian Flu in Montana

The current outbreak has led to the deaths of more than 52 million birds in the United States

A Covid-19 testing site in New York City on December 9. An estimated 27.6 percent of cases nationwide were caused by the XBB.1.5 variant this week, according to the CDC's most recent data.

What to Know About the 'Most Transmissible' Covid-19 Variant

XBB.1.5 is the fastest-spreading variant in the country, but it is not known to cause more severe illness than previous ones

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