[dsc]

“Each cabin intakes and exhausts air separately”

Admittedly, I only served on six ships. And, admittedly, they were Navy ships and not luxury liners. However, I just don’t see how that could be done.

[deport]

COVID-19 , SARS and MERS

https://www.google.com/search?q=SARS&rlz=1CAXGER_enUS827&sxsrf=ALeKk01nSs684TN1xUyfgZWvm5sE-h4Zpw:1582338454975&source=lnms&tbm=nws&sa=X&ved=2ahUKEwiwt5eMjuTnAhXsRd8KHUddDkoQ_AUoAXoECA8QAw&biw=1920&bih=953

[Wonder Warthog]

"Admittedly, I only served on six ships. And, admittedly, they were Navy ships and not luxury liners. However, I just don’t see how that could be done."

Very easily. The heat/chill medium is central and runs off ship power. The liquid coolant circulates through the ship to heat exchangers in each room. Air circulation is a simple fan/duct arrangement from outside air and back, probably with some kind of particle filtration in the air loop. Zero possibility of bacterial/viral cross-contamination.

Navy ships have totally different requirements.