This interim guidance has been developed on the basis of the advice issued by the Strategic Advisory Group of Experts (SAGE) on Immunization at its extraordinary meeting on 15 March 2021 (1).

The guidance is based on the evidence summarized in the Background document on Janssen Ad26.COV2.S (COVID-19) vaccine and the Background paper on COVID-19 disease and vaccines. Both these documents are available on the SAGE COVID-19 webpage: www.who.int/groups/strategic-advisory-group-of-experts-on-immunization/covid-19-materials. 

Position paper Janssen COVID-19 Vaccine COVID-19