Beijing, August 18 (Xinhua) according to the US “Washington Post” reported that 17 local time, Mississippi State health officials (Thomas Dobbs) said that more than 400 teachers and students in the state were infected with the new coronavirus, at least 2035 students and 589 teachers have been required to be isolated, because they may have been exposed to the new coronavirus. At a news conference on the 17th, Dobbs said that about 220 schools in Mississippi have returned to school and are reporting relevant new crown infection data to the state. Of the 82 counties in the state, 71 counties reported new coronavirus infections in schools, and 245 teachers and 199 students tested positive for NCV. Dobbs pointed out that students who tested positive for the virus did not necessarily get infected at school, and in most cases, it seems that these students brought the virus to the campus. He and the governor pointed out that the state will also start virus testing for teachers who are asymptomatic and not required to be quarantined. < p > < p > in August, students from all over the United States have returned to class, but when students or school staff are diagnosed with new coronavirus infection, or some people have to be isolated, the resumption plan has to be shelved.