Dr. Richard L. Hodinka, professor of pediatrics and pathology at the University of Pennsylvania and director of the clinical virology department at the Children ’s Hospital of Philadelphia, proposes that molecular testing is the “gold standard†for influenza diagnosis, on the grounds that the commonly used rapid flu diagnostic tests have extremely low accuracy and newer molecules The detection is far superior to the original gold standard-virus culture in terms of sensitivity, specificity and speed. Dr. Hodinka pointed out that advances in molecular technology will affect the identification of pathogens, follow-up investigations and monitoring of drug susceptibility and disease progression. The 2009 pandemic H1N1 flu made everyone realize the necessity of improving influenza diagnosis methods, and also highlighted the advantages and disadvantages of virus diagnosis methods. There are many unsatisfactory aspects of this virological diagnosis method that has been used for many years. The H1N1 influenza pandemic has really exposed this situation. Although it is still the most commonly used flu diagnostic test, there are indeed many shortcomings in the rapid flu diagnostic test. They vary according to the type of influenza detected, and some methods can only detect influenza A. In addition, these methods differ in their ability to identify influenza A and B, the type of specimens required, and the handling and storage conditions. There is currently no virological diagnostic method that can distinguish influenza A subtypes, or between human influenza and mammalian or avian influenza. The false-negative rate of rapid testing is often high, and its sensitivity can usually only reach 50% to 70%. For pandemic influenza, the sensitivity is even only 10% to 70%. Overall, its specificity is good, but false positives can also occur. Sensitivity and specificity vary according to the age of the patient and the type, sufficiency, and storage conditions of the specimen, as well as the type or subtype of the virus. Generally speaking, this type of test is more sensitive to children because their viral titers in the respiratory tract are higher than adults; meanwhile, the sensitivity to the detection of nasal aspirates is generally higher than the detection of throat swabs Children's sensitivity ranges from 65% to 90%, and adults from 24% to 91%. Both the positive predictive value and the negative predictive value of rapid detection have a great relationship with the prevalence of the virus. If the prevalence of the virus is high, the probability of false positive results will be less, while the false negative and true positive results will be more likely. Therefore, the positive results in the non-influenza season and the early flu season and the negative results in the high incidence season need to be verified. Although the rapid detection performance is poor, it does have the advantages of simplicity, low cost, and rapid diagnosis, and is still the only detection method in many medical institutions. Beijing Yaanda Biotechnology Co., Ltd. is established on the basis of the State Key Laboratory. It is a high-tech enterprise founded by senior personnel with backgrounds in life sciences, biotechnology and returning students studying abroad. The company specializes in operating experimental instruments, research reagents and laboratory consumables in the field of biological sciences, and is committed to providing first-class services to biological science researchers at home and abroad. At present, the company's products cover biochemistry, molecular biology, immunology, cell biology and other related fields. Due to the characteristics of high quality and stability, high cost performance, etc., it has won a good reputation in the majority of scientific research institutions, research schools and related enterprises. Thus established a three-dimensional marketing network and has a wide range of customer resources. While providing high-quality products to users, the company always puts customer service and technical support in a more important position than product sales. The company hires full-time and part-time technical support personnel to provide professional and personalized technical services to customers. Adhering to the concept of "being a person first, then doing things", the company adheres to the tenet of "taking quality as life and customer as center", and dedicate the best quality products and the most considerate service to our customers. Facial Cleanser,Hyaluronic Acid Facial Cleanser,Foaming Facial Cleanser,Face Wash Anti-Freckle Facial Cleanser Guangzhou Shishi Daily Chemical Co.,Ltd. , https://www.cosmeticok.com