On 24 July, Vietnam was enjoying its 99th consecutive day without any detected community transmissions of coronavirus. The country’s Covid-19 death toll stood at zero, while the case total was just 416, many of which were Vietnamese people returning from abroad, and were quarantined upon arrival. While the borders remained closed, daily life had largely returned to normal: masks were no longer required, social distancing regulations had expired and domestic travel was doing major business, with popular destinations packed on weekends.
That changed the following day, when a community transmission case was confirmed in Da Nang, a city of one million on the central coast. The case total has since climbed to 1,060, while the death toll has reached 35, and the source of the initial transmission remains a mystery.