Wednesday, March 10, 2021, 13:38 GMT+7 A medical worker prepares a shot of AstraZeneca/Oxford COVID-19 vaccine at the National Hospital for Tropical Diseases – Dong Anh District Branch in Hanoi, March 8, 2021. Photo: Nam Tran / Tuoi Tre Five people who were among the first in Vietnam to be injected with a COVID-19 vaccine developed by AstraZeneca/Oxford have experienced side effects, according to the Ministry of Health. Since the launch of the COVID-19 vaccination on Monday, a total of 522 medical workers, who are directly treating COVID-19 patients, conducting sampling and testing, a...