Table 1 Population Attributable Factor (PAF) calculated from the negative binomial regression by period of interest in the Belgian COVID-19 crisis. Entire period: 1 March 2020 2021 – 1 June 2021, Wave 1: 1 March 2020 – 22 June 2020; Interwave 1: 23 June 2020 – 30 August 2020; Wave 2: 31 August 2020 – 1 December 2020; Interwave 2: 2 December 2020 – 14 February 2021; Wave 3: 15 February 2021 – 1 June 2021. PAF = Population Attributable Fraction