COVID-19 vaccine coverage effectiveness among elderly with geographical information system mapping: what about

Widya Ratna Wulan1, Evina Widianawati2, Anis Tri Wahyuni2

  • 1Department of Health Information Management, Faculty of Health Science, Universitas Dian Nuswantoro, No 1-5, Nakula Street, Semarang District, Central Java 50131, Indonesia.

Abstract

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