My parents who live in Taiwan were talking about it just as they were coming home from visiting me in the states around November 2019 and they were so concerned that they advanced me a box of medical grade masks by mid January, due to having lived through the hysteria with SARS-COV-1 in 2003.
No one took COVID19 seriously here while I commuted for work in NYC via MTA. At most, bottles of hand sanitizers did start appearing in the office late January but no one wore masks until the announcement for the "15 days to slow the spread" campaign.