There are no sub-generations in Coronavirus, it should be asked about the mutated strains, in terms of time, the third generation of Neo-Coronavirus mutated strains are Delta Virus. Since the discovery of Neocoronavirus in 2019, up to now in 2022, there have been many mutations, large and small, and the more famous ones are the 5 mutated strains, Beta mutated virus, Alpha mutated virus, Delta mutated virus, Gamma mutated virus, and Omicron virus. In general knowledge, the Delta virus is the third generation of the new coronavirus mutation. The latest epidemic virus is now Omicron, a new mutated strain of this virus that is also constantly mutating. You should wear a mask and follow local precautions during an epidemic.