Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), along with extensive non-pharmacological interventions, have profoundly altered the epidemiology of major respiratory viruses. Some studies have described virus-virus interactions, particularly manifested by viral interference mechanisms at different scales. Still, our knowledge of the mutual interactions between SARS-CoV-2 and other respiratory viruses remains incomplete.Here, we studied the interactions between SARS-CoV-2 and several respiratory viruses (influenza, RSV, hMPV, and hRV) in a reconstituted human epithelial airway model, exploring different scenarios affecting the sequence and timing of co-infections. We show that the virus type and the sequence of infections are key parameters of virus-virus interactions, having the impact of primary infections on the regulation of the immune response a determinant role in the outcome of secondary infections.
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