Period 3 (20.11.13-21.07.06.) Period 4 (21.07.07-22.01.31.)
Figure 8. Association between Ct values and number of new cases by
COVID-19 wave
We performed a regression analysis to examine the association between Rt
and number of new cases. The time lag at which the two variables were
most strongly correlated was 3 days. Thus, we analyzed the association
between Rt and incidence per million population three days later, and
the results confirmed a positive association between the two, where new
cases increased with increasing Rt (Figure 8).