Why is the antigen still negative even though the symptoms are already obvious?

It could be just the common flu. Winter is the peak season for flu, and the symptoms of flu are very similar to those of COVID-19, so it is difficult for ordinary people to tell which one they have at the first sight.

There may be something wrong with the antigen test process. It is also possible that you are really positive, but it was not detected due to various accidents. Common mistakes are generally the following:

Case 1: The testing technique is wrong. If you don't poke deep enough, don't rotate the nasal cavity enough times, or don't do it for long enough, it may result in insufficient virus adsorbed on the swab and a negative result.

Case 2: The test card is operated incorrectly. Generally speaking, 3-4 drops of sample should be dripped onto the test card. More or less drops may lead to wrong results. If the test card is moved or tilted after dripping, it may also affect the results.

Case 3: The antigen reagent is stored incorrectly. Most COVID-19 antigen test reagents are stored and transported at temperatures between 2-30 degrees and can be stored at room temperature. If placed in a refrigerator, the properties of the reagent may be affected during refrigeration, and direct testing at this time may result in inaccurate results.

This is why some people feel that they have all the symptoms, but the antigen test result is never positive.

One minute with the doctor, the postures are constantly improving

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