This article discusses the prioritization of scarce and in-demand influenza vaccines during a pandemic. The mass vaccination campaign in Canada against H1N1 influenza in 2009 illustrated that some groups considered vulnerable may also be stigmatized. In 2009, prisoners and people with severe obesity were given priority of H1N1 vaccination in some Canadian jurisdictions. Assigning priority for vaccination to such groups may be socially unpopular. This article examines a number of possible arguments that might motivate opposition to prioritizing stigmatized groups. We (...) find these arguments flawed. They rely on a suspect ‘social worth’ rationale for the prioritization of scarce resources. Furthermore, human rights concerns support the prioritization of vulnerable but stigmatized groups for vaccination during a pandemic. We also argue that it is necessary to prioritize vulnerable but stigmatized groups to promote the common good in its various forms. The article concludes with an analysis of an objection that no vulnerable groups—stigmatized or otherwise—should be given priority for influenza vaccination in a pandemic. We argue that the objection is based on a confusion. (shrink)