Effectiveness of Vaccine Chatbot on HPV Vaccine Awareness and Vaccination in China

The intervention group will be invited to use the HPV vaccine chatbot online through WeChat or any web browsers, where they can ask any questions related to the HPV vaccine and get previously validated answers from the chatbot immediately. All the answers will be drawn from a database, whose content were obtained from official websites of Chinese government, HPV vaccine enterprises, and International organizations like WHO, and had been validated by experts. The intervention lasts two weeks, with invitations sent every four days to reinforce the intervention.