I'm not finger pointing, however, at many nursing home/assisted facilities, etc., there are many medical/private physical therapy cos/staff (PTs, DOs, NPs, MDs, etc.) who are Asians coming/going. Many Chinese travel back and forth. They all weren't wearing masks prior to this outbreak. Our famous mall has customers traveling regularly to and fro China. A couple retailers have been quite nervous for many weeks and personnel spend most of their time sanitizing counters, registers - everything in site. It's unimaginable the bacteria on sample products sitting out on counters for customers - no guarantee every single item is cleaned/bacteria removed.
Many Chinese wear masks (even walking/strolling) and I'm sure take every precaution necessary but not all before this outbreak. From what I hear most shopping is electronically/phone these days - stores have been empty for mos but different dynamics for those in the medical field who have to show up after return visits.
I heard Viet Nam has/had no travel restrictions.