IDSA 2025 Guidelines on the Use of Vaccines for the Prevention of Seasonal COVID-19, Influenza, and RSV Infections in Immunocompromised Patients.

Respiratory viruses-including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2 or COVID-19), respiratory syncytial virus (RSV), and influenza-pose significant risks to immunocompromised patients, who experience attenuated vaccine responses and higher morbidity. To address evolving vaccine recommendations for the 2025-2026 season, the Infectious Diseases Society of America (IDSA), in collaboration with the Vaccine Integrity Project (VIP) and partner organizations, developed rapid guidelines for US-licensed vaccines targeting these viruses. The guideline applies to adults and children with compromised immunity due to hematologic malignancy, solid organ or hematopoietic cell transplantation, autoimmune disease on immunosuppressants, human immunodeficienty virus with severe immunosuppression, and similar conditions. Strong recommendations, supported by moderate certainty evidence, endorse timely administration of age-appropriate COVID-19, RSV, and influenza vaccines, with guidance on optimal timing relative to immunosuppressive therapy and transplantation. Coadministration of these vaccines is considered appropriate. Research gaps remain in immunogenicity, durability, and clinical effectiveness, particularly for patients receiving B-cell-depleting therapies or early post-transplant. Priority areas include defining correlates of protection, optimizing vaccine schedules, evaluating high-dose or adjuvanted formulations, and improving real-world effectiveness and safety data. Equity and access strategies are essential to ensure uptake among vulnerable populations. These guidelines aim to support evidence-based decision-making and highlight the need for harmonized, multi-virus research to inform tailored vaccination strategies for immunocompromised individuals.