R. Kugathasan

This study shows Delta and Omicron SARS-CoV-2 variants do not provide cross-protective immunity against reinfection in hamsters.

This study identifies distinct genetic determinants in the Omicron spike protein for altered cell entry and antigenic properties, showing they are separable and may affect future variant severity and vaccine efficacy.

The paper identifies spike mutations that adapt SARS-CoV-2 to mustelid hosts and assesses their impact on human infectivity and antigenicity.

This study shows that SARS-CoV-2 variant B.1.1.7 does not replicate better in airway cells or escape antibodies, suggesting its increased transmissibility is due to other factors.

This study shows the furin cleavage site in SARS-CoV-2 spike protein enhances replication in airway cells, contributing to transmission efficiency.

This study examines how egg adaptation of the H3N2 influenza vaccine strain affects antibody responses in children, finding higher seroconversion rates to the adapted strain but differential mucosal IgA responses based on prior serostatus.