India approves dengue vaccine: Doctor explains the four virus strains and why immunity remains a major challenge - The Times of India

India approves dengue vaccine: Doctor explains the four virus strains and why immunity remains a major challenge - The Times of India
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The dengue virus belongs to a family called flaviviruses and exists as four distinct serotypes: DENV-1, DENV-2, DENV-3, and DENV-4. Although they are closely related, they are different enough for th… [+712 chars]

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