Michael Osterholm, on July 21, spoke with us on the Vaccine Integrity Project that he is spearheading in response to vaccine-related actions taken by the second Trump administration. “We are in totally unprecedented times.” He explores the VIP’s genesis and mission, its steering committee and partner medical associations, and the VIP’s forthcoming scientific brief on vaccines for RSV, flu and Covid, scheduled for release in early August. “Someone has to stand up and deal with the dis- and mis-information.” While the VIP is not a shadow of the Advisory Committee on Immunization Practices (ACIP), many actors who are witnessing the ACIP’s decline—insurers, medical societies, states and others—are now seeking reliable, alternative scientific data. If VIP comes under attack, will it be possible to mobilize strong bipartisan support? “This is not a fight between Mike Osterholm and Secretary Kennedy. It is about supporting the science. … All we are trying to do is save the vaccines that we know are so important.” It will be critical to manage carefully the risk that we are heading into a confusing, balkanization of the vaccine enterprise—and to restore the integrity of the ACIP.