Indian Council of Medical Research's (ICMR) Head of Epidemiology and Communicable Diseases Dr Samiran Panda on Tuesday said that the Omicron variant of coronavirus is gradually replacing the Delta variant in many states across the country.Indian Council of Medical Research's (ICMR) Head of Epidemiology and Communicable Diseases Dr Samiran Panda on Tuesday said that the Omicron variant of coronavirus is gradually replacing the Delta variant in many states across the country. Coronavirus, Covid, Covid In India, Omicron In India: Omicron Replacing Delta Variant In Many States: Top Government Expert