system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Dengue hemorrhagic fever is caused by -
assistant
The correct answer is  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