“…Officially, Vietnam was only back on track for the “new normal” after May 13, 2022, after the success of the COVID-19 vaccine strategy, under which nearly 100 % of Vietnamese people aged above 18 years old were vaccinated with at least two doses of the COVID-19 vaccine [ 58 ]. In order to overcome the restrictions of the government's quarantine, social and physical distancing policies, an online survey was therefore believed to be most appropriate [ 59 , 60 ].…”