TY  - BOOK
TI  - Sputnik V shot 90% effective vs Delta-Gamaleya
KW  - Sputnik V
KW  - effective
KW  - Delta
UR  - http://elibrary.doh.gov.ph/cgi-bin/koha/opac-retrieve-file.pl?id=ce87ddc042c1729ab9450d4ce0f03f21
ER  -