The move issued by authorities of Quang Ngai Province is aimed to deal with the spread of Covid 19.
Tourists in Ly Son
Foreigners who are in Ly Son are encouraged to return to the mainland early.
Provincial authorities have also instructed to ensure the food supply for local people's demand.
Police will tighten control over Covid-19 information to detect fake news.
To date, Vietnam has confirmed the 30th Covid-19 patient, including 16 who were discharged from hospital following their full recovery.
