The National Institute of Health (NIH) Islamabad and Aga Khan University (AKU) have confirmed the presence of XBB, sub-variant of Omicron variant and one of three dominant strains of Covid-19 in China, in the country through genome sequencing. According to the reports, Sindh Health Department on Tuesday confirmed the presence of XBB and XBB-1 sub-variants of the Omicron variant in Karachi. Karachi has detected six cases of the new Covid-19 variant, XBB and XBB-1, the health department said in a statement. However, they confirmed that the South Asian country was still safe from the highly infectious variant – BF. Earlier today, the National Institute of Health (NIH) denied all reports regarding the presence of new variants of Covid-19 in Pakistan. According to the latest figures issued by the National Institute of Health (NIH), at least 15 people were tested positive for Covid across the country in the past 24 hours.