Aviandari, Tifa, Eti Poncorini Pamungkasari, and Bhisma Murti. 2021. “Management Analysis of the Implementation of Covid-19 Vaccination in Reducing Positivity Rate in Regency Health Office of Boyolali, Central Java”. Journal of Health Policy and Management 6 (3):190-202. https://thejhpm.com/index.php/thejhpm/article/view/243.