Fig. 1
From: Dental service utilization and the COVID-19 pandemic, a micro-data analysis
The operating dates of Tehran University’s dental clinics. The x-axis shows the time in year-month for the events in Iranian (YYYY-MM) and Christian (MMM-YY) calendars. The gray boxes highlight the periods that Subsidized (S) and Private (P) clinics were not functioning at full capacity due to University’s calendar. The COVID-19 lockdown period is highlighted with a gray arrow. The number of new COVID-19 cases and deaths are shown with blue and red lines on the left and right y-axes, respectively. These lines depict the major COVID-19 waves in Iran (Source: World Health Organization and Iran’s Ministry of Health and Medical Education)