India has trains that are literally so packed you can't sit down, and this is their main mode of transportation for almost the entire population. Daily trains like this over and over and over again.

Their population (general) is third world and simply don't get the message, and would be too poor to "just stop" going to work anyways. You simply wouldn't have stopped huge amounts of people piling up together there, you wouldn't. If the virus was going to spread fast and ravishly murder, it would have killed millions there almost instantly.