delta variant ki khabhar : the presence of the delta form in the samples sequenced in the last four weeks is more than 75 percent who : पिछले चार हफ्तों में दुनियाभर के 75% संक्रमित मरीजों में मिला डेल्टा वेरिएंट : WHO

delta variant ki khabhar : the presence of the delta form in the samples sequenced in the last four weeks is more than 75 percent who : पिछले चार हफ्तों में दुनियाभर के 75% संक्रमित मरीजों में मिला डेल्टा वेरिएंट : WHO

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