The U.S.' measles outbreak is now the largest since the disease was declared eliminated in 2000, according to CNN.
On Monday, the CDC reported 626 measles cases in 2019 so far, but the agency only updates its official numbers once a week. Since then, CNN says states have reported 55 additional cases, which pushes the outbreak past the previous highest year.
Twenty-two states have confirmed cases, but as of Monday the CDC only considers five of them to currently have ongoing outbreaks — which is defined by three or more cases at once. Those states are New York, Washington, New Jersey, California, and Michigan.
Measles is a respiratory illness that's highly contagious — and also vaccine-preventable. Health regulators recommend children be fully immunized against 14 preventable diseases by the time they're 6 years old. That includes the measles, mumps and rubella, or MMR vaccine.
The growing number of unvaccinated children has government officials concerned. One of them is Ned Sharpless, the new acting commissioner of the FDA. In his first speech at the agency, he said he wants to communicate the safety and effectiveness of vaccines to the public.
Additional reporting from Newsy affiliate CNN.