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The retention time of antibodies in the body is limited.
Currently, throat swabs are the fastest way to test whether they are positive for new coronary pneumonia. But the throat swab technique sometimes produces false positives or tests many times to detect a positive result. This is mainly because the respiratory tract is connected to the external environment, and the virus itself is easily affected by the external environment, and therefore it is not easy to persist in the respiratory tract. This is why anal swabs that were discussed online at the previous stage will appear.
Whether it is a throat swab or an anal swab, it mainly detects whether IgG and IgA are present in the sample. IgG appears first during the infection process, and IgA is mainly a local antibody on the mucosa of the respiratory and digestive tract.
Blood antibody detection technology mainly detects IgG antibodies, which is more accurate than throat swab technology.
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