Written by Leela Murali | New Delhi | Updated: May 10, 2020 8:23:17 am An illustration of the coronavirus. It is important to understand the structure of the virus to develop a vaccination or drug that could fight it. (File Photo) In the Covid-19 story, there are three possibilities that lie ahead: One, communities develop immunity against the disease, two, a drug is invented to contain the disease, and three, a vaccine is made available.