Novel coronavirus pneumonia patients with latent period of 19 days who have asymptomatic infections

Recently, Wang Meiyun, director of the medical imaging center of Henan people's Hospital, published an article entitled "preserved asymptomatic carrier transmission of covid-19" in the medical journal JAMA This article focuses on a family case report and analyzes the details of suspected asymptomatic infections in China According to the research article, the family pathological report mainly included 1 asymptomatic patient and 5 new crown patients with fever and respiratory system clinical symptoms The asymptomatic patient was a young woman who had lived in Wuhan She went to Anyang, Henan Province on January 10, 2020, and in the following days, she contacted 5 relatives one after another Four of the five relatives were women, aged 42-57 years old, without Four relatives of the asymptomatic patients who had been to Wuhan or contacted other people from Wuhan except the asymptomatic patients mentioned above had fever and respiratory symptoms successively from January 23 to 26, and were admitted to hospital on the day of symptoms, all of them were confirmed to be infected with new coronavirus Novel coronavirus pneumonia was reported in January 17th, and another family member who had asymptomatic infection began to have a fever and sore throat and went to the local clinic The clinic did not report any new crown virus cases The symptoms improved in the next few days, but the symptoms aggravated and became hospitalized in January 24th Finally, novel coronavirus pneumonia was developed among 2 of the 5 relatives, and the other 3 were moderately infected However, in asymptomatic patients, on January 26, the new coronavirus nucleic acid test was negative On January 27 and January 31, the chest CT of the patient was normal, the C-reactive protein level and lymphocyte count were also normal The new coronavirus nucleic acid test was negative, and it was positive on January 28 The reexamination on February 5 and February 8 was negative, but as of February 11, the body temperature had not been increased or increased Have fever, gastrointestinal or respiratory symptoms, including cough and sore throat The novel coronavirus can be transmitted by asymptomatic carriers from the sequence of events in the family, the authors point out The novel coronavirus pneumonia with asymptomatic infection lasted for 19 days, Wang Meiyun said Although the incubation period is longer than the average, it is still within 0-24 days of the incubation period After a research article published by the academician Zhong Nanshan's medrxiv on preprint website, the incubation period of new crown pneumonia was 0 days, the longest being 24 days For 3 days At the same time, the researchers said, if there are more reports of asymptomatic carrier transmission, it will also bring more challenges to the prevention and control of new coronavirus infection pneumonia In the novel coronavirus pneumonia diagnosis and treatment plan (trial version fifth), the "infectious asymptomatic person may also be the source of infection".