The new mutant strain ba5 in this case should be referred to as omicron BA.5, which is an omicron mutant strain of the new coronavirus. There is no authoritative information on whether omicron BA.5 is better than other neocoronavirus variants. Omicron BA.5 is more insidious, more infectious, and more immune evasive than previous Omicron variants. Asymptomatic and mild cases predominate among those who have been vaccinated and infected with the omicron strain. Those with clinical symptoms mainly showed low to moderate fever, dry throat, sore throat, nasal congestion, runny nose and other symptoms. The prognosis of most patients is good, while a few patients are in critical condition. Mild cases tend to have mild symptoms, and the treatment mainly includes general treatment, such as bed rest, ensuring sufficient calories, ensuring sufficient water intake, etc.; antiviral treatment, such as Nematrevir tablets/ritonavir tablets orally, etc., may be taken if necessary. Immunotherapy and respiratory support therapy may also be required for severe cases. If you have any of the above symptoms, it is recommended that you seek medical advice promptly.