Let's say hypothetically that all the trains stop operating effective from tomorrow, will that stop the spread? Unfortunately, NO! But there will be a catastrophic effect if the trains stop running. It's not even that hard to imagine as we had already seen a glimpse of it last year. Millions of people, including migrant labours, general public, soldiers, leisure travellers were stuck wherever they were on 22nd March, and even after that the virus didn't stop spreading.
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Besides, do you think railways is distributing free tickets to lure people into traveling? The...
more... travellers should decide on their own whether it is necessary for them to travel or not. But the option to travel should always remain open in case the need arises out of nowhere. You can't blame the govt for everything. All the necessary information has already been disseminated, people need to take due precaution hereon further.