An official at the CDC who oversaw the agency's recommendations for COVID-19 vaccines has resigned, following a week of mixed messaging from federal health officials.

Childhood vaccination rates against measles fell in the years after the COVID-19 pandemic in nearly 80% of the more than 2,000 U.S. counties with available data

Dr. Jessica Shepherd, a women's health expert and chief medical officer of "Hers," discusses the recent conflicting information on the COVID vaccine for children and pregnant women.

In a break with HHS Secretary RFK Jr.'s recent announcement over removing Covid vaccines for children, the CDC released its latest immunization schedule recommending the vaccine for healthy children.

Cardiac deaths have increased since 2020 and remain high, with more people dying at home from heart attacks, a study in JAMA Network Open medical journal revealed.

Symptoms appear to be similar to other variants of COVID-19 and the public health risk remains low, WHO information shows.

ABC News Medical Unit producer Sony Salzman joins Live to discuss the Trump administration's new health policies.

Last month, an average of about 350 people died each week from COVID, according to data from the CDC. With available vaccines and treatments, why are people still dying?

Some health experts say annual booster shots are not worth the risk for otherwise healthy people.

A spokesperson said Rock & Roll Hall of Famer tested positive for COVID and has canceled his show in Sugar Land, Texas.

The site has been directed to a new landing page that argues for the theory that COVID-19 originated from a mistaken lab leak in Wuhan, China. 

Aimee Bock, founder of Feeding Our Future, was convicted in a plot that stole from a federal program meant to feed children in need.

Five years after the WHO declared the COVID global outbreak to be a pandemic, frontline health care workers reflect on what they remember of the early days of COVID.

Doctors Kimberly Shriner and Matthew Sims reflected on their time working the frontlines of the COVID-19 pandemic and shared what they have learned five years on.

A look at the numbers since Covid was announced as a global pandemic five years ago today, and how low vaccination rates still fuel serious infections and illnesses.

The World Health Organization declared the COVID-19 outbreak to be a pandemic on March 11, 2020.

It's been five years since the World Health Organization declared COVID-19 to be a pandemic.

Five years after the WHO declared COVID to be a pandemic, questions remain including how many people have died.

It's been five years since the World Health Organization declared COVID-19 to be a pandemic.

Researchers say lab studies show the new strain discovered in bats may have the potential to infect humans, but there are no known human infections.

The CDC said in a statement on Monday that it does not believe the new coronavirus found in bats poses a concern to public health currently.

ABC News’ Medical Correspondent Dr. Darien Sutton breaks down the top medical headlines happening in the U.S. and how to stay healthy.

A new CDC study published Monday found that more than 1 million children were affected by long COVID in 2023. Higher levels were found in lower-income households.

On the fifth anniversary of the U.S. declaring a public health emergency over COVID-19, people continue to lose their lives.

Respiratory viruses are continuing to spread across the United States and such activity "is expected to continue for several more weeks."

The U.S. is seeing a "quad-demic" as cases of COVID-19, flu, RSV and norovirus spread at the same time. Experts said this is what you need to know.

Four viruses are currently circulating in the United States, together earning the name "quad-demic."

ABC News medical correspondent Dr. Darien Sutton answers your health questions and shares how to make saline at home. 

The so-called "quad-demic" includes flu, COVID, RSV and norovirus, with ERs across the country seeing a surge of patients, according to health officials.

ABC News' Morgan Norwood brings the latest updates as even one state's hospitals are forced to restrict visitors.

Dr. Stephanie Widmer joins GMA to talk the infectious diseases hitting hard this season and how to stay healthy.

The paper was retracted from its journal due to ethical and methodological issues.

A new study published this week found severe COVID-19 infections from the first wave of the pandemic could double the risk of heart attack and stroke.

Former President Trump is disputing a report that, during the COVID-19 pandemic, he secretly sent Vladimir Putin a COVID-19 testing kit for his personal use.

The FDA has authorized the first over-the-counter combination COVID-19 and flu test outside of emergency use, which delivers results at home in about 15 minutes.

The latest evidence that the pandemic, far from creating a country of couch potatoes, actually woke America from its entrepreneurial slumber.

Starting Thursday, Americans can order four free at-home COVID tests from the federal government ahead of respiratory virus season.

Americans can order free tests for the third year in a row ahead of the upcoming respiratory virus season.

The findings show that teenage girls were more affected than teenage boys, potentially impacting their mental health and even their behavior.

Former New York Gov. Andrew Cuomo began his public testimony before Congress on his COVID-19 nursing home policies on Tuesday.

Former New York Gov. Andrew Cuomo began his public testimony before Congress on his COVID-19 nursing home policies on Tuesday.

Updated COVID-19 vaccines are arriving for the fall and winter season. Experts say you should get vaccinated, but you may not need to rush to receive the shot.

A recent study on semaglutide, the active ingredient in popular weight loss drugs like Ozempic and Wegovy, found that it may reduce the risk of COVID-related deaths.

A new study published in the Journal of the American College of Cardiology found that people taking Wegovy during the COVID pandemic were less likely to die from the virus.

More than four years after the start of the COVID-19 pandemic, some immunocompromised and disabled Americans have changed their way of living completely to survive.

New data from the CDC shows that COVID levels are on the rise across the nation. ABC News' medical correspondent Dr. Darien Sutton reports.

Families will be able to order up to four free tests as the FDA authorizes updated COVID vaccines.

The U.S. government is restarting the free at-home COVID tests program this month as federal officials prepare for the upcoming fall and winter respiratory virus season.

The FDA approved and granted emergency use authorization Thursday for updated COVID-19 vaccines for the upcoming fall and winter season.

The study, published Wednesday in the journal JAMA, shows children with long COVID may show different symptoms depending on their age.