Sanmi is contagious, but it is weak, but it still needs isolation. The isolation period is 15-2 1 day. The difference between four secrets and three secrets is mainly the difference of virus infectivity. Four secrets are not contagious and do not need isolation; Sanmi is contagious, but it is weak, but it still needs isolation. Now the epidemic situation is still grim, so we should abide by the epidemic prevention regulations and do a good job of personal protection.
Basic introduction
Yuriko koike, the governor of Tokyo, was the first to use this word. In order to facilitate people to better understand the essentials of epidemic prevention and control, and to operate in daily life, yuriko koike summarized the opinions of epidemic experts as "three secrets". Nowadays, preventing "3 secrets" has become a new way of life for Japanese nationals to prevent and control the epidemic.
Because of the particularity of Covid-19, if the cases are asymptomatic and have no symptoms in the early stage, then Yimi doesn't know that he has been infected, and may have infected Ermi and Sanmi one after another, so it is necessary to find them one by one.
City CDC comprehensively and quickly investigates relevant contacts, ensuring that every time, every action track, every vehicle and every colleague are clearly checked, ensuring that the transmission route is effectively cut off and preventing the spread of the epidemic.