Keep asking why. Why was this worker ordered to stay home. Was it because he had a brief, 5 minute contact with a covid-19 patient? Other news outlets say that Smalls was unique in his being sent home.
Or maybe was it because he was pushing for a union and the company wanted to find a way to keep him out. Given the article, the latter seems FAR more likely.
The "5 minute" contact argument doesn't make any sense to me, and only works to weaken his case. To my knowledge there is no minimum time requirement for virus transmission, so this argument comes across as naive.
If five minutes of exposure is really that big of a threat - perhaps it is? - then why does Amazon care about their employees so much that they waited weeks to act and then only sent a tiny number of people home?