Figure 6

Change in frequency of the top 15 mutations in the most-sampled countries in our dataset: y-axes show mutation frequency (number of mutations per sample) averaged over a period of 7 days where periods with fewer than one sample per day were removed and x-axes show the collection date. Line colors were kept consistent with Fig. 5: blue lines are mutations shared across all these countries in the top 15, while the red lines are unique to that one country in the top 15 and the gray lines are non-unique and non-common variants where the mutation is observed in more than one country. Areas highlighted in yellow and blue as, mentioned in text, to indicate pre-lockdown and post-lockdown.