(1/2) New study just out, face masks effective for source control against influenza and seasonal coronaviruses, even reducing virus detection in aerosols in patients with coronavirus infections. 5 years of hard work to generate the data https://www.nature.com/articles/s41591-020-0843-2

(2/2) Collaborative project with @Don_Milton using the G2 machine that he designed. One of the co-authors with her head in the machine shown here: