Public health officials are monitoring the quick spread of a gastrointestinal disease experts are calling "explosive diarrhea." Here's what to know.

Public health relies on data – whether it is tracking the effectiveness of a given year’s flu vaccine, monitoring blood lead levels around the country or estimating the prevalence of diabetes. This data forms the basis for decisions such as whether a community should expand screening for diabetes and which communities are at greatest risk of severe flu-related illnesses.

The parasite found in uncooked fresh produce contaminated with human feces has sickened thousands and hospitalized hundreds all over the U.S.

FoodNet, a CDC-led federal collaboration, made tracking the cyclospora parasite optional in 2025.

Nearly 7,000 people in the country may have cyclosporiasis, a parasitic foodborne illness that can cause weeks of intestinal unrest and diarrhea, according to the latest federal figures. There are 1,645 lab-confirmed domestic cases,

The CDC will have less data to track the spread of Covid and new variants after the public health emergency ends on Thursday. The U.S. has a fragmented health-care system where the authority to decide what disease data gets reported largely rests with ...

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Dr. Erica Schwartz sought to reassure senators she would follow the science as lawmakers pressed her on vaccines, abortion data and disease surveillance.

Public health relies on data—whether it is tracking the effectiveness of a given year's flu vaccine, monitoring blood lead levels around the country or estimating the prevalence of diabetes. These data form the basis for decisions such as whether a community should expand screening for diabetes and which communities are at greatest risk of severe flu-related illnesses.

By interfering with how communities collect data, the CDC risks undermining the hard-won trust needed for effective public health.

"Think intentionally about what you can do today. Add greens to your meal. Walk a little bit longer."