Guidance for repeated PCR testing in individuals previously positive It can cause muscle and joint pain, and flu-like symptoms. The primers and probes used targeted the ORF1ab and N gene regions of SARS-CoV-2. This can prevent you from activities that require a negative test result. However, the studies reporting the close contact of recovered patients with re-positive PCR test are rare. Role of the Funder/Sponsor: The study funders/sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication. Because the dataset they used was quite small, Jaenisch emphasizes that more information is needed to establish exactly how common this phenomenon is in real life and what it might mean for human health. Homepage tests and antibody tests are not accepted. The pharyngeal swabs can also be placed in the same tube together with the nasopharyngeal swab. Due to privacy concerns, data cannot be made openly available. Further studies should follow up patients who are not health care professionals and who have more severe infection after hospital discharge or discontinuation of quarantine. On the basis of the study by Jing Lu et al [12], the prevalence of re-positive cases in the discharged patients is 14%. Here, the information from 118 hospitals in Wuhan on COVID-19 patients who had a positive SARS-CoV-2 PCR test between December 31, 2019, and August 4, 2020, was collected from the surveillance network of Wuhan Center for Disease Control and Prevention (Supplementary Table1 for the names of hospitals) and performed a retrospective analysis to ascertain the epidemiological and clinical features of those with a re-positive test. In March, N. Korea ordered PCR tests for 10,000 people in six major Y.L. The discharge criteria of the recovered patients included the following: a normal body temperature for more than 3days, obviously improved respiratory symptoms, pulmonary imaging showing obvious absorption of inflammation, and two consecutive negative SARS-CoV-2 PCR tests taken at least 24h apart. COVID-19 diagnosis and illness severity was defined in accordance with the Chinese management guidelines for COVID-19 published by the National Health Commission of the Peoples Republic of China.
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