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It's too early to say what kind of an issue it will be globally. Too little is known about the virus and the disease itself.

There are now a million confirmed cases in India.

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This is what the graph showing the total number of cases for India looks like.

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The same for the USA

A lot depends on how many cases are asymptomatic or have only mild symptoms and are thus never diagnosed. That is simply unknown. If the proportion of those is large, then the virus will be hard to stop but there will be much less need to do so. If the proportion is small, those who are opposed to any social distancing measures and enhanced hygiene will cause major harm because with some discipline the virus could be stopped and it would not cause a lot of deaths and health problems that may last much longer than a few weeks in some cases.