Vietnam teacher apologizes after igniting smear campaign against AirVisual
'I regret that my negative comments about AirVisual has affected and obstructed the app’s operations in Vietnam'
AirVisual says targeted by ‘coordinated campaign’ to discredit it in Vietnam
AirVisual has been accused of manipulating its data in order to sell air purifiers
Air quality app AirVisual ‘gone’ from app stores in Vietnam amidst choking pollution
AirVisual’s data have been frequently cited by Vietnamese news outlets in recent weeks as air quality in Vietnam’s two largest cities has been on a serious decline since September