The United States has officially surpassed 4,000 measles cases this year, with more than a quarter of them coming from a single state that seems to be competing for a title nobody wants. According to recently released data from the Centers for Disease Control and Prevention (CDC), there are currently 4,080 measles cases reported across 47 states and Washington, D.C., as confirmed Friday.

Pennsylvania alone accounts for 1,105 of those infections, which is more than 400 cases beyond the state with the second-highest reported number, South Carolina at 670. The outbreak is the worst the commonwealth has seen in more than 35 years, which is a long time to hold onto a record you didn't want in the first place.

The situation has sparked a public feud between Pennsylvania Gov. Josh Shapiro and U.S. Health Secretary Robert F. Kennedy Jr. over the state's reported deaths tied to measles. The CDC describes measles as a highly contagious virus but adds that two doses of the MMR vaccine provide the best protection against the illness. The Pennsylvania Health Department states both doses together are 97 percent effective at preventing measles for life - a statistic that somehow remains controversial in certain circles.

Forty-two percent of cases across the U.S. in 2026 were among children aged 5 to 19, according to CDC data, while 17 percent are children under 5 and 40 percent are people over 20. So basically, measles is an equal-opportunity uninvited guest.

The agency found that there have been 42 separate measles outbreaks so far in 2026, with 96 percent of confirmed cases being outbreak-associated. For all of 2025, there were 2,289 measles cases reported in the U.S. across 45 states and Washington - a figure that now looks quaint.

The Pennsylvania Health Department has reported 5 measles-associated deaths as of the CDC's most recent update, but the federal agency is only reporting a two-person death toll. The discrepancy is the source of the bitter dispute between Shapiro and Kennedy, in which the two have clashed over what constitutes a measles death - because apparently even death is up for debate now.

The CDC's database does not specify where or when these deaths occurred, so it's not clear if the tally includes Pennsylvania's reported cases. However, no other state has recorded a measles death this year. The CDC says on its website, "This number is subject to change. CDC will update its reporting as additional information becomes available and relevant reviews are completed." Which is the bureaucratic equivalent of "we'll get back to you."

In New York, the ongoing measles outbreak caused New York Gov. Kathy Hochul (D) to declare her first statewide disaster emergency of 2026 on Monday. The Empire State has reported 97 cases this year, up from 26 in 2025, according to the CDC. In 2025, three people in the U.S. died from measles - two in Texas and one in New Mexico.