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. 2021 Jun 18;16(6):e0253451. doi: 10.1371/journal.pone.0253451

Fig 1. Test positivity of respiratory viruses based on weekly laboratory surveillance data in Canada.

Fig 1

The grey vertical bar indicates initiation of preventive measures against coronavirus disease 2019. Respiratory syncytial virus (RSV), parainfluenza virus (PIV), adenovirus (ADV), human metapneumovirus (MPV), human rhinovirus/enterovirus (RV/EV), seasonal human coronavirus (COV), and influenza A/B (IFV).