Immunological and clinical efficacy of COVID-19 vaccines in immunocompromised populations: a systematic review

BackgroundAvailable data show that COVID-19 vaccines may be less effective in immunocompromised populations, who are at increased risk of severe COVID-19.ObjectivesWe conducted a systematic review of literature to assess immunogenicity, efficacy and effectiveness of COVID-19 vaccines in immunocompromised populations.Data sourcesWe searched Medline and Embase databases.Study eligibility criteria, patients, interventionsWe included studies of...