it appears COVID-19 might not be spread via aerosol transmission,
   instead via larger droplets:

   [1]https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article

   """

   From our examination of the potential routes of transmission, we
   concluded that the most likely cause of this outbreak was droplet
   transmission...

   Virus transmission in this outbreak cannot be explained by droplet
   transmission alone. Larger respiratory droplets (>5 μm) remain in the
   air for only a short time and travel only short distances, generally <1
   m ([2]2,[3]3). The distances between patient A1 and persons at other
   tables, especially those at table C, were all >1 m. However, strong
   airflow from the air conditioner could have propagated droplets from
   table C to table A, then to table B, and then back to table C
   ([4]Figure).

   """

   best regards,

References

   1. https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article
   2. https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article#r2
   3. https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article#r3
   4. https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article#tnF1