Abstract
The Omicron BA.1 variant of SARS-CoV-2 displays an attenuated phenotype in the Syrian hamster after intranasal inoculation. This is characterized by reduced viral replication and lung pathology in the lower respiratory tract. Here, we report that intratracheal inoculation with Omicron BA.1 recovers the lower respiratory tract replication and pathogenicity as observed with other lineages.
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