After Thane, patients infected with Omicron sub-variants XBB and XBB.1 have also been found in Mumbai. This is for the first time, the above two sub-lineages are found in the city. The cases came to light in the 16th genome sequencing done by the Kasturba Lab of BMC, an official said.

In the genome sequencing, Xbb was found in 15 percent of the samples and Xbb.1 in 14 percent of the samples. Health officials of the BMC say that the new subtype is not a cause for concern as mild symptoms of corona have been found in patients infected with them, he added.