Microbiology Virology da6b997f Most virulent dengue fever strain is - A 1 B 2 C 3 D 4 High-Yield Explanation 4 types of dengue virus exist. DEN1,DEN2,DEN3,DEN4,in which 2 is more virulent REF:ANANTHAN ARIYANAM of your TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.523