Dr. Osterholm from CIDRAP in MN - world reknowned kind of guy - has stated point blank that he thinks the encouraging of hand washing is mainly bogus, and that in fact he thinks BREATHING is the main form of transmission. It explains the Shincheonji church "auntie" who spread to so many people so fast, as well as the Biogen in Boston where 3 guys infected 70.
CIDRAP Summary
Roland Baker III (Molecular Genetics U.C. Berkeley) agrees with him - he's RT a lot from various people on twitter, said this
"We found that viable virus could be detected in aerosols up to 3 hours post aerosolization, up to 4 hours on copper, up to 24 hours on cardboard and up to 2-3 days on plastic and stainless steel."
link to one of his tweets about it.