(Photo: VNA)

Central Da Nang city takes the lead nationwide in the rate of smartphone users downloading the app, with more than 42% of its population. It is followed by the northern province of Hai Duong, Hanoi and the northern province of Quang Ninh.

Bluezone also allows users to make online health declarations and inform authorities of COVID-19 suspects.

Currently, Vietnam has basically put the pandemic under control. However, people are recommended to continue installing and using Bluezone continuously to help trace any possible contacts with COVID-19 patients accurately.