The B.1.617.1 and B.1.617.2 variants of the Covid-19, first identified in India, have been named as ''Kappa'' and ''Delta'' respectively, the World Health Organisation (WHO) announced on Monday as it named various variants of the coronavirus using Greek alphabets.

"Today, @WHO announces new, easy-to-say labels for #SARSCoV2 Variants of Concern (VOCs) & Interest (VOIs). They will not replace existing scientific names, but are aimed to help in public discussion of VOI/VOC," Dr Maria Van Kerkhove, WHO''s technical Covid-19 lead, tweeted on Monday.