Copy of OP Memorandum Circular No. 20 dated May 9, 2023 signed by Executive Secretary Lucas P. Bersamin, with the subject: "Encouraging All National Government Agencies, Instrumentalities and Local Government Units to Support and Participate in the Measles-Rubella and Bivalent Oral Polio Vaccine Supplemental Immunization Activity (MR-BOPV SIA) from 01 to 31 May 2023".
