Although Taiwan and the global community have entered the post-pandemic era, COVID-19 and influenza remain major respiratory threats. Despite the availability of comprehensive local healthcare services, declining public awareness has resulted in suboptimal vaccination coverage for both diseases, falling short of mitigating future surges and long-term health burdens. Globally, the co-administration of COVID-19 and influenza vaccines has been proven safe and effective. In collaboration with the Taiwan Medical Association, allied professional societies (associations) and government agencies, the Taiwan Association of Family Medicine convened two high-level summits to develop vaccination strategies for preventing acute respiratory infections. These efforts culminated in the adoption of a national co-administration policy for COVID-19 and influenza vaccination. Discussions also explored the details and challenges encountered during the first year of implementing the “Co-Administration of COVID-19 and Influenza Vaccines: Left Flu, Right COVID” (“Co-Admin”) strategy. Key topics included approaches to increase disease prevention awareness among the public and self-efficacy among healthcare professionals, to foster demand for vaccination and willingness to engage in proactive health education, and to enhance the intention and administrative measures of healthcare institutions for co-administration of both vaccines. Feasible goals and actionable plans were recommended to overcome these challenges. Looking ahead, sustained and strengthened collaboration among the government, local health authorities, and professional organizations—along with the “Co-Admin” vaccination policy support—will be critical for reinforcing Taiwan’s preparedness against future waves of acute respiratory infections.