Vietnam confirmed on Monday its first locally transmitted case of the coronavirus in nearly three months, after the infection of a man related to a flight attendant who had tested positive after returning from Japan two weeks ago.The country's health minister ordered provinces and state agencies to tighten screening and controls and contact tracing efforts were launched after the 32-year-old man was confirmed as the first reported domestic infection in 89 days.With its strict quarantine and tracking measures, Vietnam has managed to quickly contain its coronavirus outbreaks, allowing it to resume its economic activities earlier than much of Asia.Vietnam crushed its first wave of coronavirus infections in April and went nearly 100 days.