Pre-existing anti-SARS-CoV-2 immunity decreases viral spread but increase SARS-CoV-2 Omicron competitiveness in hamsters

In a new study, researchers assessed the impact of pre-existing immunity against SARS-CoV-2 acquired by previous infections (PI) or COVID-19 vaccination on the transmission of SARS-CoV-2 variants of concern such as Delta and Omicron.

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Cross protection to SARS-CoV-2 variants in hamsters with naturally

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Cross protection to SARS-CoV-2 variants in hamsters with naturally

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Cross-variant protection against SARS-CoV-2 infection in hamsters