COVID-19 is a global problem not only in Vietnam.
Many countries already restricted entry and closed borders.
Vietnam now only allow people from safe countries with visa obtained from departing countries' consulate/embassy.
VOA letter issued before also now difficult to enter. Heard send back someone to India before landing in Vietnam.
People who obtained any kind of visa should double check before they start to travel. It's not a good time to go up and down.
Please don't be panic but keep calm and follow instructions for your safety and others!
There are many ways to die. Why should we die in a terrible stage with COVID-19 and spread to others?
So all we need is personal hygiene and patience which will save you and others from spreading!
Here is a good and latest read:
New Evidence Shows How COVID-19 Has Affected Global Air Pollution