This article states that In late February 2020, an instructor experienced cerebral pain, sore throat, myalgia, and weariness while going in Europe, where local area transmission of serious intense respiratory condition Covid 2 (SARS-CoV-2) was progressing (1). Subsequent to showing up back in the United States, the educator got back to class February 24–27 while encountering similar side effects in addition to restricted hack. An oropharyngeal swab test gathered on March 1 was positive for SARS-CoV-2 by switch record PCR (cycle limit esteems N1 = 35.05, N2 = 35.2; RNase P = 23.58). All understudies who went to classes with the contaminated instructor were told to isolate themselves at home through March 12. After the isolate period, we directed a serologic review to survey potential SARS-CoV-2 transmission in a homeroom setting. During February 24–27, the instructor showed 16 classes, all in a similar room, each with <30 understudies. Of the 16 classes, 10 were conversation based, in which the educator announced strolling around the room and talking straightforwardly with understudies (intuitive classes). For the other 6 classes, the educator sat for the most part in 1 area and close connections with understudies were restricted (noninteractive classes).

Reference link- https://wwwnc.cdc.gov/eid/article/26/9/20-1802_article