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Pandemiology Watch (January 28-February 3, 2026.)

Our latest report covers data from January 28-February 3, 2026. This update provides an overview of communicable diseases, highlighting key trends, emerging outbreaks, and notable developments. We have included direct links to the sources referenced, allowing for deeper insight.
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    Emerging outbreaks 

    According to CIDRAP on February 2, 2026, researchers in Bangladesh have found an emerging bat‑borne virus called Pteropine orthoreovirus (PRV) in stored throat swab samples from five patients who were initially suspected of having Nipah virus infection. All five had symptoms similar to Nipah virus infection and had recently drunk raw date‑palm sap which is a known route for bat virus transmission. They all tested negative for Nipah virus in standard tests, leading scientists to use advanced genetic sequencing to detect PRV instead. This suggests that other bat‑borne viruses may be circulating undetected in humans, highlighting the need for increased surveillance and testing in the region. 

     

    MEASLES

    US.

    As of January 30, 2026, the United States has reported 588 new measles cases, according to the Center for Disease Control. In 2026, the age group 5-19 accounts for 343 of the cases (58%), and children under 5 years account for 157 of the cases (27%). Of the cases reported in 2026, 94% were unvaccinated or had an unknown vaccination status and 17 of the cases have been hospitalized (3%). A total of 2,855 measles cases and three deaths have been reported to date. 

    According to CIDRAP on February 3, 2026, the measles outbreak in South Carolina has grown by 29 new cases, bringing the state’s total to 876 confirmed cases. Among these cases, 800 patients are unvaccinated, and 555 of the cases are in children aged 5 to 17. Most cases are in Spartanburg County, which accounts for 841 of the cases. Health officials continue to urge vaccination to prevent further spread.

    Two detainees at the South Texas Family Residential Center in Dilley, Texas, have tested positive for measles, according to ABC News on February 2, 2026. The infected are in quarantine, and anyone who may have been exposed is also isolated as all movement within the facility has been paused.

    Canada.

    As of February 2, 2026, Canada has reported 94 new measles cases in 2026, according to the Public Health Agency of Canada. In 2026, 50 of the cases occurred in children (62%). Alberta accounts for 36 of the cases (38%), and Manitoba accounts for 44 of the cases (47%) reported so far in 2026. 82 of the cases reported in 2026 were unvaccinated (87%), and three required hospitalization. A total of 5,603 measles cases and two deaths have been reported to date.

     

    MPOX

    From January 28 to February 3, 2026, there have been no significant updates on Mpox outbreaks worldwide.

     

    H5N1

    U.S.

    As of February 3, 2026, the Centers for Disease Control and Prevention reports has not reported any cases of person-to-person transmission of H5N1 in the United States. The total remains at 71 confirmed human cases and two deaths.