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Antibody Response Following COVID-19 Boosters During the Omicron Wave in the United States: A Decentralized, Digital Health, Real-World Study

Doornek, T.; Shao, N.; Burton, P.; Ceddia, F.; Fraile, B.

2022-08-02 infectious diseases
10.1101/2022.07.31.22278173 medRxiv
Show abstract

As the coronavirus disease 2019 (COVID-19) pandemic evolves, new methods that enable real-world studies can provide public health information regarding long-term immunity following vaccination and booster campaigns. We conducted an observational trial to assess antibody levels against SARs-CoV-2 following COVID-19 vaccine boosters in adults in the United States during the omicron wave. This study utilized mobile health technology to recruit and enroll participants in combination with at-home blood collection self-conducted by participants and self-administration of surveys. The results show that when compared with the Pfizer-only primary/booster COVID-19 vaccine, the Moderna-only primary/booster vaccine substantially boosts and maintains high antibody titers over time against the ancestral strain and variants, including BA.1; the geometric mean ratios were generally statistically significantly greater when comparing the Moderna-only to the Pfizer-only vaccine/booster series over much of the study period. These observations suggest that priming/boosting with the Moderna vaccine may be highly protective against COVID-19; such data are vital to inform future recommendations for COVID-19 boosters and to assess the emergence of variants.

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