Fig. 1.

Influenza seasons run 25 weeks from November to following April each year. Taiwan's national severe influenza (2019/2020) case number dropped from a peak in January down to zero in March 2020 (A). The severe influenza and invasive Streptococcus pneumoniae activities were reversed from initiation of the measures to fight the COVID-19 outbreak in January (A and B). The death toll from pneumonia in the 2019/2020 influenza season was slightly downward in contrast to escalating trends of previous influenza seasons (C).