The test will help people know whether they have recently been infected with coronavirus.
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MORE: Costco offering at-home COVID-19 tests
Costco offering at-home coronavirus tests for $130-$140
The price is $25 and most results are said to be confirmed in 15 minutes.
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Ralphs' parent company Kroger is the first U.S. retailer to offer rapid antibody testing to customers.
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