The U.S. flu season is underway

A pediatric emergency medicine physician shares how to prepare for flu season with a "flu box" or "sick box."

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.

This year's flu vaccine reduced the risk of hospitalization in the Southern Hemisphere but wasn't as effective as the one used in the prior season, a new CDC study found.

There were 200 pediatric flu-related deaths in the 2023-2024 season, compared to the previous high of 199 during the 2019-2022 season.

April Nelson said the reunion between her children was "beautiful."

New CDC data updated Friday shows 25 states are experiencing ‘high’ or ‘very high’ levels of respiratory illness activity.

Data from the the Centers for Disease Control and Prevention shows respiratory illnesses are elevated in 38 states.

New York City Health + Hospitals is bringing back indoor masking across its buildings in areas where patients are being cared for amid a rise in respiratory viruses.

Amid a rise in COVID and flu cases and hospitalizations, several hospitals across the U.S. are reinstating mask requirements for staff and visitors.

New CDC data updated on Friday shows COVID and flu hospitalizations continue to increase across the U.S. as the CDC director says she believes we've hit the peak of RSV.

Older adults who got a COVID booster and a high-dose version of the flu vaccine together may have an increased risk of stroke, according to a new FDA-funded study.

Moderna announced the first participant has been dosed in the company's phase 3 clinical trial of its combination flu and COVID vaccine.

Flu and other respiratory viruses, like RSV, are starting to circulate but levels are not as high as they were this time last year, CDC data shows.

This year’s respiratory virus season is set to be a repeat of last year’s, with COVID-19, RSV and influenza impacting the health care system at the same time, per the CDC

Doctors are warning cases of influenza B are ticking up across the US, but that there's no cause for concern just yet.

As the CDC monitors a rise in strep A cases, experts explain why testing positive for the flu can increase the risk of a secondary bacterial infection.

Seasonal flu activity remains high but is declining in most areas, according to data released Friday by the Centers for Disease Control and Prevention.

Pediatricians share their advice for parents as kids face flu, RSV and more.

With COVID, flu and other viruses still circulating at high rates, experts reveal how to best protect yourself from infection while you're traveling for the holidays.

After fears that a "tripledemic" would overwhelm hospitals, cases of RSV appear to be declining while infections of flu and COVID-19 increase.

A father is warning about how serious the flu can be for children as his 10-year-old son remains hospitalized, battling the virus.

Some schools across the United States are temporarily closing to stem flu outbreaks, but public health experts said this is not a sustainable long-term solution.

Health officials are making another urgent push to encourage flu and COVID vaccinations, as multiple respiratory viruses swirl around the country.

New data from the CDC shows that 44 U.S. states are reporting "very high" or "high" levels of flu activity.

Surgeon General Vivek Murthy spoke with "GMA3" about the upcoming flu season, the so-called "triple threat" and how Americans can best prepare.

Doctors spoke to ABC News about how they're handling a surge of RSV and flu patients, running out of bed to take care of sick kids and experiencing burnout.

The most important thing is to get vaccinated no matter the circumstances, doctors say.

New CDC data released Friday shows flu continues to rage across the U.S. with at least 4.4 million illnesses, 38,000 hospitalizations and 2,100 deaths from influenza.

The child was under the age of 5, according to the California Department of Public Health.

For the second consecutive week, flu cases, hospitalizations and deaths have doubled, according to data from the CDC.

The CDC reports that flu cases have continued to rage across the country.

Corewell Health East, a hospital system in Michigan, said it is restricting visitors under age 5 due to the surge in RSV and flu cases.

Flu cases, hospitalizations, and deaths have nearly doubled, with the southeast and south-central regions of the U.S. being hit the hardest.

Flu vaccine uptake is lower this year compared to last year even as the U.S. experiences a surge of respiratory illnesses, the CDC said Friday.

Pfizer and BioNTech announced Thursday that they have started a phase 1 trial on a combination COVID-19 and influenza vaccine.

An Indiana school announced it is closing for a few days after several students have contracted flu, RSV and COVID-19.

Flu season is making an early comeback as flu-related hospitalizations are the highest in over a decade for this point in the season, the CDC says.

Hospitals are being inundated with pediatric patients sick with respiratory illnesses.