TY  - BOOK
TI  -  Vietnam says new Covid variant is hybrid of India and UK strains 
KW  - new Covid variant
KW  - hybrid of India strains
KW  - hybrid of UK strains
UR  - http://elibrary.doh.gov.ph/cgi-bin/koha/opac-retrieve-file.pl?id=abaab6a481f18d283413d302b00cf320
ER  -