The high risk groups include shippers, sellers at wet markets, employees of supermarkets and trade centres, sellers at home-based grocery stores, petrol sellers, long-haul truck drivers, security guards, construction workers, sellers at pharmacies, workers at retail warehouses, persons performing duties at pandemic checkpoints, those supporting anti-pandemic activities, and environmental workers.
The second phase of mass testing from Wednesday to Friday aims to identify and isolate infection cases from the wider community.
Hanoi completed the first phase of mass testing at high-risk areas in 30 districts from August 10 to August 15. More than 313,000 people were tested, of whom 29 were infected with the virus.