Dengue hemorrhagic fever is caused by -
Type I dengue virus
Reinfection with same serotype of dengue virus
Reinfection with different serotype of dengue virus
Infection in an immunocompromised host
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
Virology