Welcome to the first edition of FOI Clinical. Each week, I'll send you a briefing on outbreak news. When something urgent breaks, you'll get an alert the same day.
In this edition
Notable measles clusters - Shift toward influenza B - Pertussis trends - Meningitis in Illinois - Tularemia in Oklahoma - Mumps in Maryland - Nipah in India and Bangladesh
National Interest
Measles
Measles outbreaks continue around the country, with 2026 on track to become another banner year. Measles incidence is the highest it's been in decades, with over 340 cases reported in December and another 721 in January.
Several notable outbreaks are underway. The outbreaks highlighted below are not a comprehensive list but rather a selection of prominent active clusters worth keeping in mind.
- South Carolina: A multi-county outbreak in South Carolina has grown to 933 cases, including 68 confirmed the week of February 1st. The Upstate region is most heavily affected, and a majority (859) of cases are in people who are unvaccinated.
- Arizona/Utah: An outbreak on the Arizona/Utah border has grown to hundreds of cases, including 251 on the Utah side and 254 on the Arizona side. A combined 18 cases were recorded during the most recent reporting week.
- Collier and Alachua, Florida: Around 50 suspected cases have been reported in association with Ave Maria University. The University of Florida has also reported two public exposures.