Dengue hemorrhagic fever is caused by -: (A) Type I dengue virus, (B) Reinfection with same serotype of dengue virus, (C) Reinfection with different serotype of dengue virus, (D) Infection in an immunocompromised host
Answer is C. Hypersensitivity or enhancement response to sequintial dengue virus infection in person sensitised by prior exposure to other serotupes of the viru REF:\p> ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.523