Inclusion Criteria:  Women with negative mammography results which are defined as BI-RADS (Breast Imaging-Reporting and Data System) 1 or 2 in the first round of mammography screening of the existing opportunistic breast cancer screening cohort Due for second round of biannual follow up of mammography Consented to be contacted via WhatsApp Messenger  Exclusion Criteria:  Those without access to WhatsApp Messenger or disagreed to be contacted via WhatsApp Messenger