Fig. 3From: SARS-CoV-2 historical global testing and genomic variabilityA An illustration of the graphical method. This specific example shows the case where the observed number of positive cases for week 2 (current week) is significantly less than that from week 1 (previous week). B 7-day Moving average of the positive cases (red) vs the range of the 14-day expectation (grey)Back to article page