Figure 6

Comparison between policy stringency index scores and effective contact ratios from Jan. 25 to Oct. 31 in 2020: (a) \(a_{1}\) effective contact ratio between \(E_m\) and S, (b) \(a_{2}\) effective contact ratio between \(I_m\) and S, (c) \(a_{3}\) effective contact ratio between \(I_a\) and S, (d) \(a_{4}\) effective contact ratio between \(E_m\) and \(N_q\), (e) \(a_{5}\) effective contact ratio between \(I_m\) and \(N_q\) and (f) comparison between domestic Mass Transit Railway (MTR) passengers flow and effective contact ratios³⁴.