Resources with keywords: surveillance
As of February 17, 2026, Central America and Mexico have reported more than 153,000 NWS cases in animals and over 1,300 cases in people.
Shakya M, Ma KC, Hughes LJ, et al.
In the United States, BA.3.2 (“cicada variant”) was detected in nasal swabs from four travelers, three airplane wastewater samples, clinical samples from five patients, and 132 wastewater samples from 25 U.S. states.
The CDC said 976 of the US cases were in 26 states, while six are related to international travel. The agency also confirmed seven new outbreaks in 2026, compared with 49 that began in 2025.
CDC is issuing this Health Alert Network (HAN) Health Advisory to share information and notify clinicians, public health authorities, and the public about recent New World screwworm (NWS) animal cases in the Mexican state of Tamaulipas, which shares a border with the U.S. state of Texas.
Wastewater surveillance testing for measles can alert public health authorities to possible local measles transmission before and during a measles outbreak and help guide public health preparedness and response.
During a June 11–September 26, 2024, measles outbreak in Oregon, a retrospective analysis of archived regional wastewater data collected during March 24–September 22, 2024, detected wild-type measles virus in 20 of 94 (21.3%) samples. The first detection of measles virus in wastewater was in a sample collected on April 3, 2024, which preceded the first confirmed measles case by 10 weeks.
This site includes monitoring of Persons Exposed to Infected Animals
Monitoring wild bird populations for the earliest possible detection of HPAI by conducting morbidity and mortality investigations and submitting specimens for laboratory testing. Ensuring biosecurity and biosafety on the Service-managed lands and waters to limit spread of the virus. At the request of our partners, assisting with the collection of biological samples for testing live and hunter-harvested birds for HPAI.
Monitoring wild bird populations for the earliest possible detection of HPAI by conducting morbidity and mortality investigations and submitting specimens for laboratory testing. Ensuring biosecurity and biosafety on the Service-managed lands and waters to limit spread of the virus. At the request of our partners, assisting with the collection of biological samples for testing live and hunter-harvested birds for HPAI.
