Experiments suggest that if one particle of Ebola enters a person's bloodstream, it can cause a fatal infection. This may explain why many of the medical workers who came down with Ebola couldn't remember making any mistakes that might have exposed them.

The quote by Richard Preston highlights the extreme infectivity of the Ebola virus. He notes that even a single particle entering the bloodstream can lead to a fatal infection, emphasizing how incredibly contagious and dangerous the virus is. This underscores the challenges faced by medical personnel when dealing with such a lethal pathogen, where even minimal exposure can have catastrophic consequences.

Preston explains why some medical workers who contracted Ebola might have no recollection of exposure. Given the virus’s high potency, infections can occur despite following safety protocols, making it difficult to identify a precise moment or mistake. This highlights the unpredictable and perilous nature of treating highly infectious diseases and the risks faced by healthcare providers.

The origin of this quote comes from Richard Preston, an author and journalist known for his work on infectious diseases, particularly his book The Hot Zone. Preston’s writing often explores the biological and medical realities of deadly pathogens, blending scientific research with vivid narrative to communicate the seriousness of these diseases.

Overall, the quote illustrates both the lethality and subtlety of Ebola virus transmission. Preston emphasizes the importance of vigilance, understanding, and respect for the microscopic dangers that can lead to severe consequences, highlighting the extraordinary risk faced by healthcare workers on the front lines of infectious disease outbreaks.