In their efforts to develop a vaccine, researchers at the time worked under the mistaken assumption that influenza was caused by bacteria, based on Richard Pfeiffer's 1892 discovery of the "bacillus ...

He was a major part of Chicago's push for LGBTQ equality, and on Sunday, Richard Pfeiffer's legacy was made a permanent part of the North Halsted community. WGN's Sean Lewis has that story.

In their efforts to develop a vaccine, researchers at the time worked under the mistaken assumption that influenza was caused by bacteria, based on Richard Pfeiffer 's 1892 discovery of the ...