Guangzhou, February 26 (Reporter Zhou Yu Guo Xiangyu), according to the CCTV China Voice “News” reported that a few days ago, Guangzhou City, has been cured patients discharged from the hospital for follow-up visits, found that there are 13 discharged patients tested positive, triggering social concern. Is “re-positive” considered cured? Is there a risk of infection when contacting patients with “repositive positivity”? Recently, Guangzhou, Zhongshan and other places appeared in the isolation of 20 days, 30 days, the test was positive patients. February 24 afternoon, Zhong Nanshan academician and Wuhan front of the Guangdong medical team ICU treatment team to carry out remote video consultation again, said it may be due to the sensitivity of the reagent kit is different caused by. “One of the reasons is that the sensitivity of the kits is sometimes a little different during the testing process, but in general, if a patient with this disease really improves, antibodies will appear in the body, and re-infection is very unlikely. If IgG antibodies show a 4-fold increase, it can be determined that the patient should not be infected.” Zhong Nanshan said that it is possible to determine whether a discharged patient is re-infected by means such as testing serum IgG antibodies. So, is a positive retest of nucleic acid in a discharged patient a reinfection with new crown pneumonia? In response to this question, in the afternoon of the 25th held in Guangdong Province epidemic conference, Guangdong Province, deputy director of the CDC Song Tie made a response: “on the current ‘re-positive’ situation, we judge that it is still because of the condition, individual physical problems resulting in not fully absorbed, clinical very few cases with poisonous situations. We are also constantly monitoring.” Song Tie said, new crown pneumonia is a new infectious disease, people are constantly recognizing it. At present, Guangdong Province has issued “Guangdong Province, the new crown pneumonia prevention and control command office medical treatment group on strengthening the tracking and follow-up of patients discharged from the hospital notice”, began to sample patients discharged from the hospital to test, to understand their “detoxification” of the situation. Song Tie said: “From the characteristics of microorganisms, people infected with the virus will produce antibodies, and will not have the ability to spread. Through laboratory observation, it was found that young people will produce antibodies within two weeks, even if there is a positive nucleic acid test, the risk is very low, this antibody is protective antibodies, the risk of transmission is getting lower and lower. But there are some older people who take a long time to produce antibodies, and may continue to detoxify and become a source of infection, we are also strengthening the monitoring, how far will people carry the virus for a long time, and how to delineate the scope of the external environment and people, we are constantly sorting out.” Source: cbc.com