Genomic sequencing carried out in Karachi has revealed that around 50 per cent of the Covid-19 cases in the city are of the United Kingdom variant of SARS-CoV-2, which is more contagious than previous variants of the virus.Sindh Health Minister Dr Azra Pechuho said this on Wednesday as she urged the people to take precautionary measures as the viral disease had started to spread at a rapid pace in the city.“Like other cities of Pakistan, cases of UK variant of coronavirus have been found in...