so given the current situation, it's interesting to me that most cruises re-circulate air and does not get any significant air that's fresh. which is a big factor making people sick. i do understand why they re-circ and it is all due to cost. but out of curiousity for mild waether places such as right now in most places , wouldn't it make more sense to re-route the HVAC to get all fresh air, and if its too cold, ask people to wear more clothes?
or can they simply not do that , tech wise? it would seem to make sense to help reduce the spread of contaminated air