We're going to listen to a guy who is head of an infectious diseases department at a school for mailmen???
“We’re going to listen to a guy who is head of an infectious diseases department at a school for mailmen???”
Perhaps you are joking. If not or if someone else assumes your statement to be factual...
From Wikipedia:
The Mailman School is considered a preeminent school of public health in the United States. The school began in 1922 as the DeLamar Institute of Public Health. It became an official school within the university in 1945. In 1999, following a $33 million grant from the Joseph L. Mailman Foundation, the school was renamed the Joseph L. Mailman School of Public Health.
https://en.wikipedia.org/wiki/Columbia_University_Mailman_School_of_Public_Health