Omicron, the latest Coronavirus variant, is probably the fastest-spreading infectious disease known to man, medical expert and Maharashtra government's Covid Task Force member, Shashank Joshi, said here on Thursday.

It has an approximately Rt5 rapid generation time. While for Measles it is 15 days, for Omicron it is less than 5, with a doubling time of 1.5-3 days, Joshi, a diabetologist and endocrinologist, said in a tweet.