After more than half a year the world battling with Delta variant of the Covid-19 and with nations one by one upping the population vaccination rate, the world probably thinking seeing the light of the tunnel already.  Unfortunately, just last month, a piece of news created another shock to the world -- a new variant Omicron was discovered in an infected person on 11th November 2021 in Botswana and 14th November in South Africa.  WHO on 26th November 2021 named this B.1.1.529 variant as Omicron and classified it as a Variant of Concern.  While scientists and researchers still gathering data on this variant in particular how much transmissible and severe relative to the Delta variant, Omicron infected person as of now in general either is asymptomatic or with mild symptoms in