There were an estimated 10.3 million cases of measles in 2023 globally -- an increase of 20% from the previous year, according to a new WHO report.

The Chicago Department of Public Health announced Thursday that the city's measles outbreak is over after six weeks with no new cases.

Health officials in West Virginia said Friday more than 150 people were exposed to measles after a case was identified earlier this week.

Officials are warning that people who attended a total eclipse event at the Children's Museum of Indianapolis may have been exposed to measles.

A new CDC report published Thursday found that the U.S.'s measles elimination status is being threatened due to the most recent outbreak this year.

Measles was declared eliminated in the U.S. in 2000 but outbreaks keep popping up across the U.S. Experts explain to ABC News why this keeps happening.

A CDC team is being deployed to Chicago to help health officials respond to the city's first measles cases since 2019, the city health department told ABC News.

Chicago health officials reported the city's first cases of measles since 2019, one in a city resident and the other in a child at a new arrivals shelter.

The seventh case of measles linked to an outbreak at Manatee Bay Elementary School in Florida was confirmed by officials on Tuesday.

National MMR coverage has dropped 2% from the 2019-2021 school year to the 2022-2023 school year,

A sixth case of measles linked to an outbreak at an elementary school in Weston, Florida, has been confirmed by officials.

Measles was once considered eliminated in the U.S. Now, doctors are having to learn how to rapidly detect and diagnose a disease they have never had to treat before.

Two decades after measles was considered eliminated, outbreaks are occurring in some pockets of the U.S. Here's why doctors are concerned.

A doctors' group is offering free measles vaccines for unvaccinated residents in Philadelphia to fight an outbreak that has infected eight people so far.

The Philadelphia Department of Health said it's tracking a measles outbreak in the city, with eight confirmed cases as of Monday.

Domestic measles cases surged in 2019, with an estimated 1,274 people sick in at least 31 states -- the greatest number of cases reported since 1992, the CDC says.

The CDC issued a Health Alert this week, warning Americans about rising measles cases linked to international travel.

American Samoa declared a public health emergency in response to a measles outbreak that's led to 32 confirmed and probable cases, all in children 13 years old and under.

The measles outbreak that infected 85 children in central Ohio has been declared over, according to health officials. Nearly all the cases were among unvaccinated kids.

The central Ohio health system is fighting measles in addition to RSV.

A new report from the CDC and the WHO says measles is an "imminent threat" globally after nearly 40 million children missed at least one dose of the vaccine in 2021.

Public health experts tell ABC News what people need to know about measles after an outbreak of the virus in Ohio sickened 19 children.

A "perfect storm" of circumstances brewing for largescale measles outbreaks affecting children, WHO and UNICEF warn, as worldwide cases rise

More than 22 million infants throughout the world didn't get their first measles vaccine dose last year.

Society bears the brunt of costs from anti-vax movement, study finds.

A student at Northeastern University in Boston was diagnosed with measles Jan. 8.

Nearly 800 Seattle students will be kept out of school today, their first day back after winter break, because they aren't vaccinated against measles.

The government of Samoa ended the state of emergency it had declared in response to its measles outbreak that swept the small island nation of fewer than 200,000 people.

More than 2,200 students were sent letters to get vaccinated.

Samoa arrested a local anti-vaccination activist as authorities carry out a mass vaccination campaign in the Pacific island nation in response to a measles outbreak.

More than 140,000 people around the world died of measles last year, most of them children under the age of 5, according to a new report.

The death toll from a growing measles outbreak on the small Pacific island of Samoa has topped 50.

The anti-vaccine movement has a history of targeting minority groups, like the Orthodox Jewish community in Brooklyn and the Somali refugee community in Minnesota.

Cobb County, a suburban part of Atlanta, Georgia, confirmed a case of measles in an unvaccinated person, according to state health officials.

A measles infection changes the body's immune response, effectively erasing the immune system's memory of previous infections.

There were no new cases of measles reported last week, the Centers for Disease Control reported Monday, which marks a notable decline from earlier this year.

Health officials declared the end of the measles outbreak in New York City.

A new report released by the World Health Organization shows that the fight against measles in Europe is on a downward slide.

The new school year is starting as there are six active outbreaks and after months where recent records for the number of measles cases in the U.S. have broken records

The number of measles cases continues to grow, though at a slightly less rapid pace than was recorded earlier in the year.