At present, there are three main official data releases about New Crown: confirmed patients, asymptomatic infected patients and suspected patients with New Crown Nucleic Acid Rapid Test.
As the name implies, confirmed patients are those who have been identified as suffering from New Coronavirus pneumonia after more than one rapid nucleic acid test, and the general confirmed patients will have the typical symptoms of New Coronavirus pneumonia: fever, weakness, dry cough, and even more will have symptoms of hypoxia and difficulty in breathing.
If there are no symptoms, why is the rapid nucleic acid test for Newcastle pneumonia still positive?
An asymptomatic patient is one who has no clinical symptoms, such as fever, cough, sore throat, and other self-perceived or clinically recognizable signs and symptoms, but whose respiratory tract and other specimens are positive for New Coronavirus pathogenesis, and whose chest CT examination does not show any viral pneumonia changes. In other words, the determination of asymptomatic infections is made by the results of the rapid nucleic acid test for New Coronavirus and by lung films. They are divided into two main types of cases, those with asymptomatic infection by the New Coronavirus Rapid Test and those with asymptomatic status in the latent phase. The latent asymptomatic state will show symptoms of New Corona pneumonia at a later stage; the other infected people will remain asymptomatic until the New Corona Nucleic Acid Rapid Test turns negative, which is medically called recessive infected people, and they are not strictly speaking patients.
Does the absence of symptoms mean that they are not infectious or less infectious than those with symptoms?
This question has been studied by many researchers.
A team of Korean researchers published their findings in JAMA Internal Medicine: symptomatic and asymptomatic patients with neoconiosis were equally infectious, and asymptomatic patients had as much virus in their mouths, noses, and lungs as patients with fever or cough. Although the viral load decreased faster over time in asymptomatic infected patients than in symptomatic ones, their average time to turn negative was only 2.5 days faster than in symptomatic patients.
Asymptomatic infected patients are at greater risk of transmission than symptomatic patients. Since asymptomatic infected persons are no different from normal people, they are easily overlooked in the population, which may reduce the awareness of prevention and control among the people they come in contact with, and asymptomatic infected persons are self-aware and do not exercise self-restraint in their behavioral trajectory, which may lead to a complicated transmission chain.
As the "gold standard" for the diagnosis of neo-coronavirus infection, the rapid nucleic acid test is the first line of defense in the prevention and control of the epidemic. It uses a fluorescent quantitative PCR method to analyze, identify, and bind specific nucleic acid fragments of the virus to generate a fluorescent reaction and report the results. The conventional Nucleic Acid Rapid Test process takes a long time, so for the initial screening of close contacts, the Nucleic Acid Rapid Test is generally used.
The highly efficient amplification reagent with the portable and compact amplification instrument can achieve rapid amplification and greatly improve the efficiency of the Nucleic Acid Rapid Test to achieve the prevention and control requirements of "early detection and early isolation".
