Researchers surprised: 20% of Chicagoans in blood-test study came up positive for coronavirus antibodies – Chicago Tribune

The SCAN research study, introduced in late June, set out to check about 3,000 people in 10 Chicago ZIP codes, and so far more than 1,000 tests have been examined, McNally stated. Researchers are discovering some differences in direct exposure rates among the ZIP codes but said they require to collect more test results before reaching any conclusions.

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