RT-PCR tests show 652 negative COVID-19 results in Hanoi
(VOVWORLD) - A total of 4,751 samples have been collected in Hanoi as of August 10 as part of an RT-PCR test campaign on locals who came back from Da Nang between July 15- 29, with 652 of the group being confirmed to have tested negative for the novel coronavirus (COVID-19).