@book{5016,
	author = {De Vera- Ruiz, Elaine},
	title = {Delta variant threat may affect herd immunity target - OCTA /},
	url = {http://elibrary.doh.gov.ph/cgi-bin/koha/opac-retrieve-file.pl?id=53356e9d6c0946cc5e2ba8f2a0315475}
}