We're told he found out on Saturday he'd been exposed at some point last week, and immediately started quarantining. Our sources say he's planning to appear on 'GMA' Thursday, remotely, to discuss his diagnosis. He's not currently experiencing any severe symptoms.
There's also this ... we've learned Strahan's daughters came into contact with him AFTER he'd been exposed -- so they're getting tested. So is their mother, Jean, with whom they live most of the time. We're told they haven't gotten their results yet.