Talking about schools, The U of Chile is about to publish a study of the first school outbreak of Covid19 in Santiago, at a private school (Saint George's), with 1,009 students and 235 teachers/workers getting tested. This is a 2,700 student facility and the students were chosen at random (not enough tests for all, nor would all give permission). The timeline was:
March 3 First case in Chile, classes start after summer holidays
March 12 SG´s teacher tests positive (arrived from Italy)
March 13 SG's closed, and new related cases start appearing
March 15 Entire Chilean school system closed
April A total of 52 cases result from the SG´s outbreak including 45 amongst the staff and parents, and only 7 students (PCR). Many parents had symptoms 6-7 days after teacher-parent meetings.
May 4 Antibody tests begin for 1,250 other SG´s students/teachers
May 15 The entire city of Santiago (8 million) goes into quarantine
The antibody tests were sent by courier with the results submitted online. The paper is now awaiting peer review and publication. Preliminary results shared via the newspaper indicate that 10% of the students were infected, 21% of the teachers, and 17% of total staff. The student infection rate varied from 6% in the 4 high school years, to 12% in preschool. 40% of students were asymptomatic, while 18% of the teachers/staff were. It is believed that transmission started in teachers meetings.
With the state of the paper publishing biz right now, who knows when the study itself will be published. This is the best I can do for a link (in spanish): http://portal.nexnews.cl/showN?valor=e4yx3
