4 times as many measles cases in a few weeks than US typically averages in a whole year: CDC
Signs point the way to measles testing in the parking lot of the Seminole Hospital District across from Wigwam Stadium on February 27, 2025 in Seminole, Texas. Jan Sonnenmair/Getty Images
(NEW YORK) — There have been at least 733 confirmed measles cases reported across the nation, the latest data from the Centers for Disease Control and Prevention showed Friday.
In just a few weeks, the United States reported four times as many cases than typically seen throughout an entire calendar year.
Before last year, which had a record breaking 2,276 cases, the U.S. averaged 180 cases annually since measles was declared eliminated in 2000.
The record numbers come as South Carolina is dealing with the largest outbreak recorded in recent memory.
Other states that have reported cases and are dealing with ongoing outbreaks include Arizona, California, Florida, Georgia, Idaho, Kentucky, Minnesota, Nebraska, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Dakota, Utah, Virginia, Washington, and Wisconsin.
Most of the outbreaks occurring across the country are in pockets of under-vaccinated or unvaccinated communities.
The rate of kindergartners vaccinated with the measles, mumps, and rubella (MMR) vaccine has fallen from 95% in 2019 to below 93% in 2025, CDC data shows. Herd immunity, a threshold for vaccination rates that slow a virus’ ability to spread, is typically achieved at 95% vaccination rates, public health experts say.
Declining vaccination rates have left approximately 300,000 kindergarteners unprotected from measles infection.
The MMR vaccine is given in two doses, the initial shot given after the first year of life and the second shot given after the fourth year of life.
This is a developing story. Check back for updates.
Stock photo of a sick child blowing their nose. Vera Livchak/STOCK PHOTO/Getty Images
(NEW YORK) — Concerns about the flu spreading in the U.S. are growing as the U.K. continues to see a spike in cases among children and young adults.
The increased number of cases in the U.K., could be a predictor for the flu season in the U.S., according to ABC News chief medical correspondent Dr. Tara Narula.
“We know that England or other places can be a marker for what is going to happen here, because their flu season happens a few weeks earlier than ours,” Narula said on “Good Morning America” Monday, adding, “We have low numbers of cases so far but they are increasing.”
Some hospitals are starting to implement flu season visitor restrictions, including the Detroit Medical Center and Children’s Hospital of Michigan, which are allowing, as of Monday, up to two visitors per patient and only those 13 years of age and older are permitted on inpatient hospital floors or in observation units.
According to data from the Centers for Disease Control and Prevention, flu activity in the U.S. is up at least 7% in the last week, and so far, there have been nearly 2 million illnesses, 19,000 hospitalizations, and 730 deaths from the flu.
Last year, the U.S. saw an extremely severe flu season, with 560,000 hospitalizations and approximately 38,000 deaths from the flu, the CDC reported in September.
Meanwhile, in the U.K., where flu season started earlier than usual this year and has yet to peak, doctors are seeing increasing flu activity that’s currently at “medium” level with hospitalizations for the flu around 7.79 per 100,000, according to UK Health Security Agency data.
Some hospitals, such as the Sherwood Forest Hospitals in Nottinghamshire, have also reintroduced face mask policies in some hospital areas in light of the uptick in flu cases.
What flu variant is circulating?
The predominant flu strain that is currently circulating the most in the U.S. is the subclade K variant.
“The strain that is circulating most … subclade K, which is a variant of H3N2, seems to have a little bit more severe symptoms and maybe more severely affects the elderly and children,” Narula said Monday.
What are the symptoms of the flu?
Flu symptoms can vary from mild to severe intensity, and according to the CDC, they can come on suddenly.
Symptoms can include as fever, chills, cough, sore throat, runny or stuffy nose, body or muscle aches, headaches, fatigue, and vomiting or diarrhea, two symptoms which tend to be more common in children rather than adults.
People who are at more at risk of developing complications from the flu, according to the CDC, include older adults over 65, children younger than 2, and people with underlying conditions such as asthma and chronic lung disease or heart disease. Complications from the flu may vary, but they may include pneumonia, sinusitis, ear infections, and kidney and respiratory failure.
How to protect against the flu
Although the subclade K flu variant is not a perfect match for this year’s flu vaccine, doctors and the CDC still recommend everyone over the age of 6 months to receive one as a protective measure.
“When they look at studies abroad in England, they have found that the vaccine lowers the risk of hospitalizations for children by about 70% to 75%, which is really good, and adults by about 30% to 40%,” Narula said.
“Everyone thinks [the flu is] not that serious, it’s just a cold, but no, it can really cause complications and death,” Narula added.
Emergency physician Dr. Stephanie Widmer also recommended practicing regular hygienic habits to stay healthy.
“On top of getting the vaccine, washing your hands often, covering your coughs and sneezes, avoid[ing] touching your face and staying home if you’re feeling sick are all things [to do],” Widmer said on “ABC News Live.”
(SPARTANBURG COUNTY, S.C.) — At least 88 new measles cases in South Carolina have been confirmed amid the state’s outbreak, bringing the total number of infections to 646, state health officials said Tuesday.
The majority of cases have been found in the Upstate region and around Spartanburg County, which sits on the border with North Carolina.
This is a developing story. Please check back for updates.
(SPARTANBURG COUNTY, S.C.) — At least 99 new measles cases are being reported in South Carolina amid the state’s outbreak.
This brings the total number of cases in the state to 310. There are currently 200 people in quarantine, according to health officials.
The outbreak has been ongoing as state health officials continue to push for vaccinations. The majority of cases are located around Spartanburg County.
“The number of those in quarantine does not reflect the number actually exposed,” Dr. Linda Bell, the state epidemiologist, said in a press releases. “An increasing number of public exposure sites are being identified with likely hundreds more people exposed who are not aware they should be in quarantine if they are not immune to measles. Previous measles transmission studies have shown that one measles case can result in up to 20 new infections among unvaccinated contacts.”
South Carolina’s department of public health said it sent a statewide health alert on Jan. 7, “advising health care providers and facilities of the importance of heightened awareness for measles and recommended measures for the use of masks and rapid isolation of suspect measles cases to protect people in health care settings from exposures.”
The Centers for Disease Control and Prevention currently recommends that people receive two doses of the MMR vaccine, the first at ages 12 to 15 months and the second between 4 and 6 years old. One dose is 93% effective, and two doses are 97% effective against measles, the CDC says.
However, CDC data shows vaccination rates have been lagging in recent years. During the 2024-2025 school year, 92.5% of kindergartners received the MMR vaccine, according to data. This is lower than the 92.7% seen the previous school year and the 95.2% seen in the 2019-2020 school year, prior to the COVID-19 pandemic.
