The COVID-19 outbreak and its practical impacts are changing policing and police responses. Alongside the relentless efforts of the health sector, the role of police forces has been the subject of debate between the global South and North. As the first study in Vietnam, this paper explains how Vietnam’s police applied community-based policing to prevent and detect the interlaced occurrences among old and new patients at the communal cluster. Multiple sources were used to collect secondary data on police responses in the first lockdowns between February and March 2020. Online interviews with police leaders and six frontline officers were conducted to collect primary data. The findings show that, in each case, Vietnamese police implemented dynamic operations as much as possible in an effort to elicit voluntary collaborations to detect and contain COVID-19. Police used “onion-layer” and “door-to-door” approaches to coordinate and cooperate with their partners in the health sector. In addition, delivering persuasive propaganda was highly prioritized to incite local people to take up preventive measures rather than enforce them. The paper concludes with four specific recommendations and further discussions aimed at improving community-based policing’s effectiveness in future exceptional circumstances.