Asserting that India's inoculation programme would begin as soon as scientists give permission, Prime Minister Narendra Modi, during an all-party meet on Friday, said the vaccine "will be ready in the next few weeks". PM Modi assured India has the necessary infrastructure to manufacture the vaccine at a large scale. "Our preparation is better than most others," he said. But, what are the logistical challenges the government could face while ensuring easy transportation and distribution of COVID-19 vaccine to the states?