Interestingly we found a tendency for BA.2 to induce a higher number of macrophage infiltrates and type 2 pneumocyte hyperplasia compared to BA.1, although differences did not reach statistical significance.
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Phenotyping the virulence of SARS-CoV-2 variants in hamsters by digital pathology and machine learning.
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MX1 expression showed a trend of higher levels of expression in Delta-infected animals but differences were not statistically significant ( S3C Fig ).