Delta is a new coronavirus variant strain that has atypical clinical features. In general, a low percentage of patients infected with the delta strain have early febrile symptoms, and many patients present with only malaise, olfactory disturbances, and mild muscle aches. Most patients will have abdominal pain, bloating, and drowsiness, and a few may present with nasal congestion, runny nose, sore throat, conjunctivitis, myalgia, and diarrhea. A significant proportion of patients are asymptomatic infections, but are more likely to develop severe disease compared to previous neocoronaviruses. Because the delta strain is different from the previous strain, the patient has a higher nucleic acid virus load, it is more transmissible, doubled compared to the previous, and the incubation period or transmission interval is shortened, the adaptability to the body is increasing, and the treatment time is longer. Therefore, once the above symptoms appear, you should seek medical attention and do a good job of personal protection, especially for areas where there have been such cases, you should do a good job of personal protection measures such as washing your hands, wearing a mask, and taking your temperature often.