Fig. 2: Appointment and vaccination rates at UCLA Health by condition for the first RCT.

a, b, Proportion of participants in each condition who scheduled an appointment for the first dose of the COVID-19 vaccine at UCLA Health between 15:00 h on the first reminder date and 23:59 h on the fifth day following the first reminder date (a) and the proportion of participants in each condition who obtained the first dose of the COVID-19 vaccine at UCLA Health within four weeks of the first reminder date (b). Error bars represent ± 1 s.e.m. The number of participants in each condition (from left to right in each panel) is 18,629, 18,592, 18,757, 18,627 and 18,749.