Experts in the department of infection said that the positive reaction needs to be confirmed by nucleic acid test. One is "false positive" or "false negative" which does not exclude self antigen test; The other is that even if the nucleic acid test shows positive, "re positive" does not mean that the disease relapses again. It is likely that the disease has not been cured at the beginning, or there is still a piece of viral nucleic acid left in the body, which will not cause the spread of the disease.
"On December 7, after several days of high fever, body aches and loss of taste, I tested the antigen at home and found it positive. After home treatment, on December 9 and 10, after the symptoms disappeared, the antigen results were negative for two consecutive days. However, on December 12, due to the presence of fever, cough and other symptoms of the residents, I tested the antigen again and found it positive." Ms. Xia, who lives in Henan Province, told the Health Times about her experience on December 16 and said she was very confused. Although no fever, cough and other symptoms have appeared so far, why is it "Yang again"?
Ms. Cui, who lives in Chaoyang District, Beijing, has a similar situation.
"I had a positive antigen test on December 8, the day after the high fever. On December 10, I basically had no fever. On December 14, two days after the antigen turned negative, I started to have a low fever again today." Ms. Cui, who lives in Chaoyang District, Beijing, told the health client of People's Daily on December 16, "I don't know whether it is the sun or not now. Is it not thorough before?" Ms. Cui was very confused.
In this regard, an infectious expert from Shanghai Changhai Hospital told the Health Times that the positive recovery needs to be confirmed by nucleic acid testing. The so-called "re positive" does not rule out the existence of false positive or false negative for self tested antigen; In addition, if the nucleic acid test results also show abnormalities, it does not mean that the disease relapses again. It is likely that the disease did not recover and the antigen may be false negative.
The infectious disease expert also made a brief analysis of the two patients' conditions: "One of the two cases is the infection of cohabitants, which will inevitably cause the spread of the virus in the living environment. At this time, the antigen results of people in the same living environment may be 'false positive'.
After the other antigen was "negative", similar symptoms appeared again. It could not be ruled out that the patient was still in the course of the disease. At this time, the viral load was reduced compared with the previous time. Because of the sensitivity of antigen detection, the antigen result was false negative at that time. "The antigen test result is negative, which means that the load of COVID-19 has dropped to a certain range. From the perspective of transmission, at this time, the possibility of patients transmitting diseases has been significantly reduced."
If the nucleic acid is also positive, the infectious expert emphasized that there is no need to panic about "rejuvenation". Most of the nucleic acid rejuvenation may be viral nucleic acid fragments left in the body, which will not cause disease transmission. The vaccinated group infected with COVID-19 will mobilize the immune memory of the body. The possibility of infection of the same virus strain within 3-6 months is extremely low. As long as you do a good job of personal protection when traveling, you need not worry too much. (Liu Ying)
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