<s>[INST] How effective is the dengue vaccine? [/INST] The dengue vaccine is 80% effective at preventing dengue illness, hospitalization, and severe dengue in children who have had dengue in the past. Source: HEALTHY CHILDREN.ORG. Link: https://www.healthychildren.org/English/safety-prevention/immunizations/Pages/dengue-vaccine-and-kids-faqs-for-families-who-live-where-dengue-disease-commonly-spreads.aspx. Field: Infectious Disease. Disease: Dengue </s>