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

A new study sheds light on the timeline of the human immune response when confronted with SARS-CoV-2 and other infectious diseases.

Why Are Some People Seemingly Immune to Covid-19? Scientists May Now Have an Answer

Researchers tracked the immune responses of 16 people intentionally exposed to SARS-CoV-2 and pinpointed a gene that seems to help resist the virus before it can take hold

Researchers are recruiting some 1,100 people globally to participate in the trial's third phase.

Personalized Melanoma Vaccine Could Be a ‘Game Changer’ by Teaching the Body to Fight Cancer Cells

The mRNA therapy, designed to prevent treated skin cancer from returning, is entering its third phase of trials

The measles virus as seen through a transmission microscope. Rising numbers of measles cases in the U.S. threaten its eliminated status, according to a new CDC report.

U.S. Measles Cases Are Rising in 2024, CDC Warns

Health officials urge vaccination against the highly contagious virus, which has caused 121 infections in the country this year

Paul Alexander died on March 11 at age 78.

Texas Man Who Lived 70 Years in an Iron Lung Dies at 78: ‘I Never Gave Up’

Paralyzed by polio in 1952, Paul Alexander led a full life despite being confined to a large steel ventilator

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

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

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

Vaccinations of wild koalas began in March this year. For now, scientists hope to inoculate 50 individuals.

Scientists Begin Vaccinating Wild Koalas Against Chlamydia

The effort is part of a field trial to limit the debilitating bacterial disease that can cause infertility, blindness and death

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

Covid-19

When Should I Get Another Covid Booster?

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

Melanoma cancer cells under a microscope

New mRNA Vaccine Shows Promise Against Skin Cancer

Research suggests the personalized vaccine, paired with an immunotherapy drug, can reduce melanoma recurrence in high-risk patients

Nearly 70 percent of the U.S. population has completed the primary series of Covid-19 vaccinations, but only 16 percent have received the updated bivalent booster dose.  

CDC Includes Covid-19 Shots in Routine Immunization Schedule

The federal health agency updated its vaccination guidance for children and adults

Moderna is one of several companies currently working on a vaccine for RSV.

Experimental RSV Vaccine Prevents Illness in Older Adults, Moderna Says

In a large clinical trial, the vaccine was 83.7 percent effective at preventing two or more symptoms of respiratory illness in people over the age of 60

Pollinators, including bees, face pressure from disease-causing organisms, habitat loss, climate change and other factors.

The World’s First Vaccine for Honeybees Is Here

It could be a game-changer for beekeepers fighting American foulbrood, a disease that can wipe out entire colonies

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

More than 150 people die every day from synthetic opioids.

Scientists Create a Vaccine Against Fentanyl

Researchers hope the vaccine, which blocked the drug from entering rats’ brains, could help reduce overdoses in humans

Only a quarter of American adults have received their flu shot this year. 

U.S. Flu Hospitalizations Highest in a Decade

The CDC estimates that 120,000 people have been hospitalized since October

Charles Boyer and Ingrid Bergman in Gaslight, a film adaptation of the 1938 play Gas Light

‘Gaslighting’ Is Merriam-Webster’s Word of the Year

Searches for the term, defined as the “practice of grossly misleading someone,” skyrocketed in 2022

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