Symptoms of infection with the mutant strain omicron are fever, muscle aches, malaise, loss of taste and smell, or no clinical symptoms at all. Symptoms of infection with the omikron strain include fever, muscle aches, fatigue, loss of taste and smell, and a large proportion of people may show no clinical symptoms. According to relevant scientific research, the omicron strain is less damaging to lung tissue, and after infection with omicron, there is a significant decrease in the number of patients with severe illnesses compared to the delta variant strain. Omicron is the main strain type of the recent epidemic of the new coronavirus. The Omicron strain has a large number of mutation sites, which makes its transmission more insidious and stronger than that of Delta and other strains, and attention should be paid to strict adherence to the epidemic prevention policy and active prevention of virus transmission.