US Measles Cases Soar to Highest Level in Over Three Decades
Over 3,600 infections recorded nationwide, with Pennsylvania reporting nearly a quarter of the total and four deaths, as CDC faces scrutiny over death tally.
The United States has recorded over 3,600 measles cases this year, marking the highest tally since 1991 and a significant increase from previous years. As of September 24, the Centers for Disease Control and Prevention (CDC) reported 3,659 infections nationwide, a 60 percent jump compared to the 2,289 cases documented in the entire previous year.
Pennsylvania has emerged as the hardest-hit state, accounting for 850 cases, which represents nearly a quarter of the national total. The state has also reported four measles-related deaths. Cases have now been reported in 45 states, with only Arkansas, Hawaii, Mississippi, New Hampshire, and Nevada yet to record any infections.
The CDC has recently confirmed a second measles-related death in Pennsylvania, a fatality that had not been previously reported by the agency. The agency has yet to officially report the other two deaths acknowledged by Pennsylvania health officials. The CDC's reporting has reportedly slowed amid a dispute over how measles-related deaths should be counted, involving Pennsylvania Governor Josh Shapiro and Health and Human Services Secretary Robert F. Kennedy Jr.
Measles, a highly contagious disease spread through respiratory droplets, typically begins with flu-like symptoms before a characteristic rash appears. In severe cases, it can lead to pneumonia, encephalitis (brain swelling), and can be fatal. Children under five, pregnant women, and individuals with weakened immune systems are most vulnerable. Among unvaccinated individuals, estimates suggest that one in every 1,000 infections can lead to encephalitis, and one to three in 1,000 can result in death.
The Measles, Mumps, and Rubella (MMR) vaccine, administered in two doses, is highly effective, reducing the risk of infection by 97 percent. Currently, approximately 95 percent of those infected this year were unvaccinated or did not disclose their vaccination status.
The majority of cases have occurred in school-aged children (ages five to 19), with 1,577 infections, followed by adults aged 20 and older, who recorded 1,407 infections. Hospitalizations have reached 327 nationwide, including 91 among children under five.
Following Pennsylvania, South Carolina has the second-highest number of infections with 670 cases, followed by Utah with 535, Texas with 192, and Virginia with 178.
In Florida, which has recorded 148 infections this year, a 18-fold increase from the eight cases reported last year, a new study suggests a potential risk for a major outbreak. Researchers modeled measles transmission in Florida and concluded that the state's current MMR vaccination coverage may be below the threshold needed to prevent sustained spread of the virus. The study indicated that if MMR vaccination rates among children were to fall to 82 percent, a significant outbreak could occur within three to five years, with smaller outbreaks potentially continuing for decades even at current coverage levels of 88.9 percent.