Background. Developing health communication materials can be time-consuming. During infectious disease outbreaks, health communication materials to limit the spread of the disease are needed promptly, which hampers the ability to get input from the target audience. This paper proposes a strategy to rapidly develop culturally appropriate communication materials with adequate community feedback. Context. Our strategy is illustrated using a communication campaign to encourage COVID-19 testing in a Vietnamese-American enclave in New Orleans. The community has a high vulnerability to COVID-19 infection due to their isolation from mainstream public health information and COVID-19 related stigma and discrimination. Programmatic elements. The project included community-based COVID-19 testing services and communication activities to increase awareness of the testing centers and encourage frequent testing. Our proposed strategy involves two main components: 1) use of a research team with existing trust relationship with the target community and that includes researchers from that community, and 2) use of a cultural broker and community-based gatekeepers. Free PCR tests were offered daily at a community-based health center. Another community-based organization promoted testing and issued referrals. We developed brochures and posters to increase awareness of the testing services. The cultural broker and community-based partners helped identify key message concepts that were salient for the target audience, as well as the objectives and content of the materials, which were then reviewed by the entire team. The entire team provided feedback on mock-ups of the materials and subsequent revisions. Finalized materials were placed at both partner organizations and at strategic locations throughout the community and supplemented with newspaper advertisements and community outreach.Discussion. During infectious disease outbreaks there is a need to rapidly develop new health communication materials. Our proposed strategy strikes a balance between the need to disseminate new materials with minimal delay and the need for community input by using a research team with an established trust relationship with the community, cultural brokers, and community-based gatekeepers. Effective planning for public health emergencies must start long before the crisis occurs. Collaborations between researchers and community leaders should be developed and nurtured, and community representatives should be involved throughout the entire project.