All 3,000 vaccine appointments have already been booked.
The shots will be given at the former Carson Pirie Scott store at 970 N. Lake Street from 8 a.m. until 5 p.m.
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The event is being done in collaboration with Jewel Osco, the City of Aurora, the Kane County Health Department and Storage for America, which owns the site.
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Aurora will hold a fifth mass vaccination event on Friday 19 at La Sierra, 2121 E. New York Street. That event has also already reached capacity.