https://www.expresscomputer.in/news/kolkata-muncipal-corporations-innovative-way-of-using-a-whatsapp-chatbot-for-vaccination-highlights-path-that-other-government-departments-can-follow/78076/
https://www.expresscomputer.in/news/kolkata-muncipal-corporations-innovative-way-of-using-a-whatsapp-chatbot-for-vaccination-highlights-path-that-other-government-departments-can-follow/78076/