The city’s public health Commissioner Dr. Allison Arwady said Tuesday that the snowfall interrupted the arrival of truckloads of vaccine doses, which typically come in the beginning of the week from facilities in Kentucky and Tennessee, but they shouldn’t take longer than a few days to arrive. By Thursday evening, CDPH spokesman Andrew Buchanan wrote in a statement, no Moderna doses have arrived in Chicago this week, while Pfizer vaccines were canceled Monday and sent Tuesday and Wednesday in “limited numbers.”