Why no community spread of Corona Virus

So far no community spread of Corona Virus in India while same time first case was reported in our country and western countries together. Can the reason be 1)Already our population is exposed to many strains of influenza and other viruses, leading to cross immunity? 2)Sub clinical immunity to malaria as chloroquin /HCQC Is drug used in Corona Virus

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U S Pattern of delay numbers can reach to lakhs in two months
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