Marburg Virus In NYC - It was an act, but NYC healthcare workers were fooled by "patients" pretending to have Marburg. On August 2, 2023 they could not distinguish real from imaginary disease in actors, treated them as if they had a deadly virus, isolated them, and notified NYC Health Department.

https://www.nychealthandhospitals.org/pressrelease/nyc-health-hospitals-leads-multi-agency-training-exercise-for-marburg-virus-an-ebola-like-disease/