27 April 2021. As unpredictable developments of COVID-19 transmission in neighboring countries pose an immense threat to Vietnam, the Southeast Asian nation’s Minister of Health, called for escalation of epidemiological measures as well as strict maintenance of COVID-19 prevention protocols in public.https://tuoitrenews.vn/news/society/20210427/fourth-covid19-wave-not-off-the-table-vietnam-health-minister/60591.html