“Which means 95% were unaffected.”
NOT TRUE!
From personal experience, unless deathly ill, you do NOT report it, fearing being quarantined to your stateroom.
I didn’t pay thousands of dollars to be stuck in my room. I’ll deal with the diarrhea and upset stomach myself.
Oh, BTW, I will NEVER go on another cruise or fly on another airplane for the rest of my life.
Exactly!! 17-day Panama Canal cruise, February 2020. First two weeks were great, third week my entire cruise group (six ladies of a certain age) all got sick with bad coughs, aches, etc. We were aware that a mysterious disease was emanating from China, so kept our mouths shut due to not wanting to be quarantined, just wanted to get off the ship and go home.