William Park and Anna Williams were a research team of scientists working in New York City. Park was a methodical investigator, known for being precise and careful. While Williams was also a meticulous scientist, she was more outgoing and a former stunt plane pilot. Together, they worked on isolating Pfeiffer’s bacillus (B. influenzae). While they made important progress during the pandemic, they struggled to create a cure for influenza, since it turned out that Pfeiffer’s bacillus was not the pathogen causing the influenza.