TEC Brief: Anticipation of the June 2025 ACIP meeting

The June ACIP meeting — the first with the newly appointed committee — is scheduled for June 25–26. Based on the makeup of the committee and last-minute changes to the agenda, we anticipate four key vaccine safety topics to surface, along with several falsehoods likely to be raised and amplified on social media:

• The MMRV (measles, mumps, rubella, varicella) combination vaccine and its association with febrile seizures

• Thimerosal in flu vaccines

• RSV protection during pregnancy and a new monoclonal antibody introduced without a placebo-controlled trial

• Covid-19 vaccines and spontaneous abortion, including a preprint released Friday, authored by a new ACIP member with a history of anti-vaccine rhetoric — a timing we believe is strategic, given its release just days ahead of the meeting

This report, prepared by members of The Evidence Collective, provides key background on each issue, anticipates falsehoods and rumors likely to arise or be distorted, summarizes current evidence, outlines possible policy implications, and offers communication guidance for public health leaders, media, and social media influencers.

We hope this equips you—a trusted voice in health—with the tools, details, and deep dives needed to drive national vaccine conversation with confidence, clarity, and authority.