While the 'feel' of the episode was very much in line with what we've seen from The Orville (good thing), building an episode based on a false premise completely removes all plausibility.
Assuming that the crew of The Orville have watched old episodes of Star Trek, which we should assume they have as they seem to be stuck on 20th century media for some reason, they should know that you NEVER EVER skip a medical scan for new arrivals!
Assuming that the crew of The Orville have watched old episodes of Star Trek, which we should assume they have as they seem to be stuck on 20th century media for some reason, they should know that you NEVER EVER skip a medical scan for new arrivals!