A measles surge in several states and a cyclosporiasis outbreak sickening nearly 2,000 people are putting U.S. public health systems under strain. The measles cases are concentrated in communities with low vaccination rates, while the cyclosporiasis outbreak has been linked to contaminated lettuce, prompting an ongoing investigation by the CDC.
Measles was declared eliminated in the U.S. in 2000, but a rise in vaccine exemptions has allowed the virus to return. The current surge is most pronounced in states like New York and California, where some parents have opted out of routine childhood shots. Meanwhile, cyclosporiasis, a parasitic infection that causes severe diarrhea, has been reported in at least 32 states. The CDC has confirmed 1,947 cases, with many patients reporting consumption of bagged salad mixes.
The two outbreaks highlight different vulnerabilities. For measles, the key driver is declining herd immunity. When vaccination rates fall below 95%, the disease spreads easily, especially among unvaccinated children. For cyclosporiasis, the issue is food safety oversight. Contaminated imported produce, often from warmer climates, has been a recurring problem.
Children and immunocompromised individuals are most at risk from measles, which can cause pneumonia and brain swelling. Cyclosporiasis is rarely fatal but can lead to prolonged illness, particularly in older adults. Both outbreaks have strained local health departments already dealing with other priorities.
Health officials are urging families to ensure their children are fully vaccinated. The CDC and FDA are tracing the source of the cyclosporiasis outbreak, advising consumers to wash all lettuce thoroughly or avoid bagged salads until the source is identified. For now, the public should stay informed and follow basic precautions.