The neutralizing antibody responses were significantly elevated after 3rd dose of BBV152/Covaxin against the B.1 (19.11 fold) variant including Delta (16.51 fold), Beta (14.70 fold) and Omicron (18.53 fold) Variants of concern in comparison with two dose vaccine, providing assurance of a protective immune response of booster in recipients.
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Deshpande et al. (2022) studied this question.
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