Article
Effectiveness of Homologous and Heterologous Covid-19 Boosters against Omicron
25 May 2022
Abstract excerpt
To the Editor: For persons who received a single dose of the Ad26.COV2.S vaccine (Johnson & Johnson-Janssen) against coronavirus disease 2019 (Covid-19), a booster dose of a messenger RNA (mRNA) vaccine at least 2 months after the primary dose is recommended. Recipients of Ad26.COV2.S for both the primary and booster doses may receive a second booster dose of an mRNA Covid-19 vaccine at least 4 months after the...
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