Figure 3 is a column graph showing the number of participants recruited each day from January to May 2014. There were a total of 3,711 participants recruited during this period. Notable recruitment activities included: on 2 May 2014 an email to all active participants with a request to invite three friends to join the survey, and 1,088 participants were recruited nationally from 2-4 May 2014; the first Flutracking survey was emailed to all active participants on 5 May 2014, and 877 participants were recruited nationally on 5 May 2014.