COVID-19 Outbreak (Update: More than 2.9M cases and 132,313 deaths in US)

efil4stnias said
assuming A1 is patient zero, the AC coming from right to left ( in pic ) doesnt help explain C 1 and C2

A/C return (intake) air flow. So, it's sucking it back toward them, then blowing it on them.

Likely less concentrated than the table to the left.