Joseph G. Allen
Associate Professor

Joseph G. Allen

Associate Professor of Exposure Assessment Science

Environmental Health



Calculating COVID-19 risk

A new COVID-19 risk calculator developed at Harvard Chan School can help people understand the ways that masking, ventilation, filtration, and other factors can mitigate the spread of COVID-19 in indoor environments.

How an open window can make a classroom safer from COVID-19

A New York Times simulation shows how proper ventilation and filtration in classrooms can make schools much safer from COVID-19 transmission. The visualization was created with input from healthy buildings expert Joseph Allen of Harvard Chan School.