Protection against SARS-CoV-2 Beta variant in mRNA-1273 vaccine-boosted nonhuman primates
- PMID: 34672695
- DOI: 10.1126/science.abl8912
Protection against SARS-CoV-2 Beta variant in mRNA-1273 vaccine-boosted nonhuman primates
Abstract
Neutralizing antibody responses gradually wane against several variants of concern (VOCs) after vaccination with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine messenger RNA-1273 (mRNA-1273). We evaluated the immune responses in nonhuman primates that received a primary vaccination series of mRNA-1273 and were boosted about 6 months later with either homologous mRNA-1273 or heterologous mRNA-1273.β, which encompasses the spike sequence of the B.1.351 Beta variant. After boost, animals had increased neutralizing antibody responses across all VOCs, which was sustained for at least 8 weeks after boost. Nine weeks after boost, animals were challenged with the SARS-CoV-2 Beta variant. Viral replication was low to undetectable in bronchoalveolar lavage and significantly reduced in nasal swabs in all boosted animals, suggesting that booster vaccinations may be required to sustain immunity and protection.
Update of
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Protection against SARS-CoV-2 Beta Variant in mRNA-1273 Boosted Nonhuman Primates.bioRxiv [Preprint]. 2021 Aug 12:2021.08.11.456015. doi: 10.1101/2021.08.11.456015. bioRxiv. 2021. Update in: Science. 2021 Dec 10;374(6573):1343-1353. doi: 10.1126/science.abl8912. PMID: 34426813 Free PMC article. Updated. Preprint.
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