Measles cases have surpassed 300 in the U.S. in 2025 thus far, more than the total number of infections seen in all of 2024.

This interactive map explains where COPD rates, hospitalizations, and deaths are highest across the United States.

A CDC program tests wastewater from airplanes, looking for pathogens that may have hitched a ride with passengers on long-haul international flights.

As new cases are reported, our maps and illustrations show the spread of the virus and how infections can run through a community.

Hantavirus comes from contact with rodents — such as rats and mice — especially after exposure to their urine, droppings, and ...