Infectious Information 9/27/2026
Key Points:
- Measles outbreaks continue to pose significant risks beyond childhood, with a notable 2024 outbreak in two Chicago homeless shelters highlighting the high costs of such events.
- Pennsylvania has reported over 835 measles cases and four deaths, though the CDC officially recognizes only one death due to reporting issues; the US total cases exceed 3,600 in 2024.
- The Ebola outbreak in Congo has reached about 7,800 confirmed cases, with experts attributing increased zoonotic disease transmission risks to climate change and habitat disruption.
- Los Angeles is experiencing an outbreak of flea-borne typhus, while Evanston, Illinois, reported two Legionnaire’s disease cases linked to a hotel hot tub.
- H5N1 avian influenza cases are rising during migration season among wild and domestic birds, and the virus has also caused fatalities in three polar bears.