2025-2026 Respiratory Syncytial Virus (RSV) Monoclonal Antibody (mAb) Season Extension Map

The AIM RSV Season Extension Map provides a national snapshot of how the 66 federally funded immunization programs are responding to ongoing virus circulation. Developed by AIM, the map visually highlights which jurisdictions have chosen to extend their RSV immunization season, offering a clear and timely view of immunization program decisions across the United States, federally funded cities, and U.S territories.

Data for the map were collected through a multi-step process to ensure accuracy and completeness. AIM staff gathered input during three AIM member meetings and followed up via email with members who were unable to attend. To confirm final decisions, AIM conducted a comprehensive email outreach to all 66 members on April 1, 2026.

As of April 1, 2026, the map uses color coding to indicate each jurisdiction’s status.

• Forty-eight jurisdictions extending their season through April 30 (noted in teal).
• Two jurisdictions, Rhode Island and Philadelphia, are extending through April 15 and reassessing (noted in green), although Philadelphia expects to align with Pennsylvania’s April 30 extension.
• Four jurisdictions have opted not to extend (noted in grey), with Virginia and Missouri allowing case-by-case consideration upon provider request (noted with an * on the map).
• Two jurisdictions remain undecided (noted in light blue).
• Ten jurisdictions have year-round seasons or non-applicable seasonal periods (noted with a faded blue dot pattern).
• Cities and U.S. territories are further detailed in the accompanying table to the right of the map, providing additional context for these areas.