HANOI -- Ho Chi Minh City, Vietnam's southern commercial hub, is on high alert after a hospital developed a COVID-19 cluster in which more than 50 health care workers contracted the virus despite being vaccinated.
Local authorities on Monday said 55 workers at the Ho Chi Minh City Hospital for Tropical Diseases, a state-run institute, had tested positive. "All of them had taken two jabs [of AstraZeneca vaccine] before testing positive," said Nguyen Van Vinh Chau, the director of the hospital. Staffers at the hospital were among the first groups to have been vaccinated in Vietnam, getting their second doses by the end of April.
