By Alice Yin, includes “… Chicago adds a state to its quarantine list if it averages more than 15 new daily COVID-19 cases per 100,000 residents over a seven-day period. People who have spent more than 24 hours in the high-risk states are required to self-quarantine for 14 days after entering Chicago.” (Note: Illinois is currently over that new daily cases threshold. Should Chicago quarantine all of its own residents next week?)