Symptoms of new COVID-19 strains: How are they different from old variant?

The new strains, some imported and a few found locally have become a major cause for concern among the people. The new variants which came from outside the country include those from UK, South Africa and Brazil. Apart from these, 'N440K' and 'E484Q' variants of SARS-CoV-2 have been detected in Maharashtra, Kerala and Telangana.

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