gWelcome to the twentieth edition of FOI Clinical. Each week, we'll send you a briefing on outbreak news. When something urgent breaks, you'll get an alert the same day.
In this edition
Cyclosporiasis - Measles - Mpox - Influenza: Lackland AFB - Salmonella: backyard poultry - Norovirus: Appalachian Trail - Chikungunya - Below-baseline declines - Ebola - Hantavirus
National interest
Cyclosporiasis
During the most recent reporting week, 64 cases were reported to the National Notifiable Disease Surveillance System, up from 48 the week prior and 20 two weeks ago. Year to date, 424 cases have been reported (1.3x prior year). The FDA is still investigating an active outbreak with an unknown food source. We covered the early acceleration in Issue 19.
Measles
CDC reports 2,104 confirmed cases as of June 18, up 31 in one week, across 41 jurisdictions (Connecticut added).
State dashboard updates:
- Connecticut: First case of 2026. An unvaccinated Hartford County adult with recent international travel, hospitalized in stable condition.
- Utah: 687 total (490 in 2026), 13 cases in the last 3 weeks. Stalling continues. Updated June 16.
- Virginia: 129 cases, up 19 in one week. Buckingham County outbreak continues. Updated June 23.
Mpox
Year to date, 640 cases have been reported (1.3x prior year). CDC's situation summary (updated June 1) notes >20 laboratory-confirmed clade I cases in the U.S. since November 2024, all linked to travel. Several Western European countries are now reporting clade Ib cases with no documented travel history, indicating local sexual transmission. Clade II remains at low levels but fall 2025 marked the highest monthly counts since 2022.
During Pride Month, several cities expanded mpox vaccination access in response to rising case counts. Boston's public health commission flagged an uptick in cases citywide and nationally, offering walk-up JYNNEOS doses at Pride events and scheduling additional clinics through the summer. The push comes after the CDC in late May removed its "Safer Sex, Social Gatherings, and Monkeypox" webpage, the primary federal guidance on reducing mpox risk at Pride events, sex clubs, and high-contact settings, despite a July 2025 federal court order requiring restoration of removed LGBTQ+ health information.