The Delta variant is around 40-60 percent more transmissible than its predecessor, Alpha variant, and has already spread to more than 80 countries, including the UK, the US and Singapore.
from Top India News- News18.com https://ift.tt/3eR2IFx
Delta Variant Accounts for 80 Per Cent of New Covid Cases: Govt Expert Panel Chief
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July 19, 2021