Coinfection, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), and Influenza: An Evolving Puzzle

(See the Major Article by Zhang et al on pages e978–92). The co-circulation of influenza virus and the severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) this autumn and winter has the potential for taxing inpatient and intensive care capacity [1] and has led to calls for increasing influenza vaccination [2]. This is far and away the most important threat that co-circulation of thes…