[Thud]

The Diamond Princess passengers were confined to their cabins. The crew lived in their normal cabins, which were generally tiny and, for the lower-ranking crew, crowded with many in bunks in bunk rooms. The crew roamed the ship doing their normal duties, which included preparting and serving meals to passengers in their cabins.

The ship ventilation system was the most likely vector by which Wuhan Virus reached the passengers. The crew infected each other.

This was certainly not as cramped. crowded and dangerous as the quarters on WWI troopships carrying American troops to Europe, or trooptrains rolling across America. Yet somehow the same proportion of the crew+passengers on the Diamond Princess got Wuhan Virus (22%) as was common for American soldier passengers on the 1918 American troopships and troop trains (20-25%).

The Diamond Princess experience is most useful in determining the proportion of victims showing symptoms to victims with no symptoms (3/7 vs. 4/7).

[calenel]

“The Diamond Princess experience is most useful in determining the proportion of victims showing symptoms to victims with no symptoms (3/7 vs. 4/7).”

Exactly. Determining penetrance of the population as a whole is not something we can look to the DP for. We don’t have valid data, yet, for comparing penetrance of CCP-19 and Spanish Flu.