claim: co-infection of influenza a virus enhances sars-cov-2 infectivity
evidence_1: through experimental co-infection of iav with either pseudotyped or sars-cov-2 live virus, we found that iav pre-infection significantly promoted the infectivity of sars-cov-2 in a broad range of cell types.", "iav promotes sars-cov-2 virus infectivity.", "the unique feature for iav to augment sars-cov-2 infectivity indicates that the influenza virus is the key pathogen of prevention and control during the current coronavirus pandemic.")