A new case of infection was reported in on Tuesday, August 25, 2026, bringing the total number of infected individuals to 29. Since the outbreak began on July 20, three patients have died. The exact source of the infection remains unknown.
The State of and AGES confirmed that the Allentown subtype was found in a cooling tower on the Linz AG power grid building. While this subtype matches three cases, genetic analyses have not yet proven the system is the primary infection source.
Linz AG has disinfected the system and switched it to dry operation, noting that drinking water is unaffected. Legionella can cause severe pneumonia when inhaled via aerosols, posing the highest risk to smokers and those with weakened immune systems.