Development of Sahabat Vaksin, a Vaccine Knowledge Portal to Support Immunization Willingness and Timeliness in Indonesia. - Yoke Saadia Irawan; Allya P. Koesoema; Soegijardjo Soegijoko; Dody Q. Utama; Annisa Riyani; Masyitah Nur Aulia (GHTC, 2019)