While the benefit-risk profile of the four authorized COVID-19 vaccines has been largely favorable in the general population, evidence remains limited for special cohorts such as pregnant women, children, immunocompromised individuals, and those with a history of allergies or previous SARS-CoV-2 infection. This narrative review critically examines the potential benefits and risks of COVID-19 vaccines in these special cohorts, and summarizes recommendations from scientific societies and regulatory agencies for primary prevention in these vaccinee categories.
To date, four vaccines have been authorised for emergency use and under conditional approval by the European Medicines Agency to prevent COVID-19: Comirnaty, COVID-19 Vaccine Janssen, Spikevax (previously COVID-19 Vaccine Moderna) and Vaxzevria (previously COVID-19 Vaccine AstraZeneca). Although the benefit-risk profile of these vaccines was proven to be largely favourable in the general population, evidence in special cohorts initially excluded from the pivotal trials, such as pregnant and breastfeeding women, children/adolescents, immunocompromised people and persons with a history of allergy or previous SARS-CoV-2 infection, is still limited. In this narrative review, we critically overview pre- and post-marketing evidence on the potential benefits and risks of marketed COVID-19 vaccines in the above-mentioned special cohorts. In addition, we summarise the recommendations of the scientific societies and regulatory agencies about COVID-19 primary prevention in the same vaccinee categories.
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