While there may be some suspicion and doubt about the effectiveness of the ring itself and if it actually can detect COVID-19 days before actual symptoms arise, there is also concern over the “data” these rings will collect.

According to The Athletic, the use of the rings will be optional, so if a player wants to opt-out of wearing the tracker, they can. But so far, there’s no word on what other data will be used to track possible symptoms besides heart rate and body temperature. ESPN reporter Zach Lowe tweeted that if players wear the rings, team personnel will not have access unless it detects an “illness probability score” that triggers a medical review.

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