Fig 2. Referral rate by day of promoter visit.

The referral rate is defined as the number of sessions in which referrals were issued as a proportion of sessions with and without referrals each day. The referral rate is reported for January 21 through May 20, excluding weekends and public holidays (3-Feb, 7-Apr, and 1-May). Vertical lines denote the initial state of emergency declaration (1-Apr) and subsequent extension announcement (29-Apr). Trends are smoothed using a uniformly weighted moving average by week, taking into account the three days before and after in conjunction with the given date.