New york city and in d.c. where students were required to produce a negative test result. but this week in chicago, the third largest school district in the country, the teachers' union voted to refused to show up for in-person work, upending school altogether. tuesday, the second day back from winter break, chicago public schools reported 422 new cases among students. while that's reportedly the highest in the school year, the district has more than 340,000 students. this translates to roughly 0.1% of the student body. that shouldn't bring everything to a halt. thousands of other schools arou...