Because the regulations of each school are different, the specific notice is the main one. However, I suggest you do one, do nucleic acid testing, just in case, the epidemic has not been completely controlled, the virus is very cunning, spreads quickly, is highly contagious and has a long incubation period.

Therefore, in order to comprehensively implement policies, it is very necessary to do a good job in strict prevention and control. The stricter we are, the more responsible we are, and every parent will understand and support this regulation.

Nucleic acid detection method (English name: Nucleic acid detection method) is a method to judge whether a patient is infected by virus by finding out whether there are DNA and RNA of invasive virus in respiratory tract samples, blood or feces, and it is the gold standard for diagnosing novel coronavirus infection. After COVID-19 infects the human body, it will first reproduce in the respiratory system.

Therefore, we can judge whether the human body is infected with the virus by detecting the viral nucleic acid in sputum and nasopharyngeal swab. All living things contain nucleic acids, including DNA and RNA. Novel coronavirus is a virus containing only RNA, and the specific RNA sequence in the virus is a sign to distinguish the virus from other pathogens.