Hotels are not set up for quarantine purposes, and the way this virus is mutating around the World, creating variants that are infecting people by air movement of virus droplets [ the Melbourne case ATM came from an Adelaide Hotel where an infected person opened their door to collect a meal, shut it, then the next room down opened their door, and the virus infected the man in that room, by travelling thru the air . ]
Vietnam has a new variant which is considered very dangerous, a mixture of the Indian variant, and with the UK mutations. Spreading thru the air. Research thru the Q.U.T. shows poor ventilation in public buildings , workplace environments, schools , aged care homes, or even activities such as singing contribute to viral spread.
Improved ventilation is vital for protecting against viral infection, scientists have warned.
The Vietnam variant;
'Very dangerous': New Vietnam variant combines Indian and UK strains (thenewdaily.com.au)
Scientists warning;
Scientists warn COVID-19 is spread through air