Pagkakaiba ng herd immunity, containment, at population protection, alamin Ang detalye mula kay Department of Health Technical Advisory Group Dr. Edsel Salvana
2021-05-28 3 Dailymotion
Pagkakaiba ng herd immunity, containment, at population protection, alamin
Ang detalye mula kay Department of Health Technical Advisory Group Dr. Edsel Salvana