I agree that the risk was negligible. We are seeing 'younger' patients but I am not seeing 25-40 year olds that would pass muster to go to sea
What is of more concern is that they got in this situation. The US military have published a number of situations where they successfully managed outbreaks, and they do now have protocols to ensure this doesnt happen. May be the key words are 'completed a deterrent patrol' ie this is more than 10 months old.....