Sohu Pharmaceutical | "Nature": Over 1/4 new crown patients are still contagious after eight days?

Author:Sohu Health Time:2022.08.03

Produced | Sohu Health

Author | Zhou Yichuan

Edit | Yuan Yue

The US CDC suggested that the new crown infection isolate for 5 days, saying that the propagation mainly occurs in the early stages of the disease. The first two days and the next three days of symptoms have the strongest spread. "Nature" recently commented that the proposal has been widely questioned by scientists since its launch, saying that many patients are still contagious two weeks after symptoms, and the proposal to shorten the isolation period is for political purposes, not scientific data.

There are three ways to evaluate the risk of communication. The first is the golden -standard nucleic acid test. Some people are questioned by the virus RNA fragments instead of the ontology. The patient's recovery is not contagious but the result is still positive. Protein may be more accurate; there is also a category to measure the virus load through the specimen. Although it is not directly measured the nasal virus, it can provide closer to real results.

In this way, a study of the Massachusetts Hospital stated that 25%of patients can still detect the virus after 8 days of symptoms, which proves that it is not reliable than 10 days of isolation. According to the London Crick Research Institute, most people have a high enough virus load 7-10 days after symptoms, which can be transmitted. The study specifically proposed that vaccination or not affects the spread of the infection, whether a fever or other obvious symptoms occur, nor can it be used as the basis for ending isolation.

There is also a possibility that the virus rebounds. Regardless of whether you take Paxlovid, the infected person may recover the sun a few days after the test. Experts speculate that antiviral drugs have changed the dynamic process of immune response, and symptoms and symptoms disappear. Therefore, after the recovery of drug treatment, it is still necessary to determine whether it is contagious.

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