Everyone on that ship should have been tested days ago, and we should already know the exact number of infected passengers and crew.
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Arm chair quarterbacking doesn’t always make good use of supplies. We don’t know how many people were tested. The number would likely change over time so hourly/daily testing wouldn’t be helpful if many were exposed while standing in long lines, waiting to board the ship. The ship likely quarantined and the real question would be when the ship’s people are prepared to disembark - test/quarantine when it’s time to act on it. But then, I’m not just assuming “nobody cares’ or they aren’t doing their jobs etc.
Neither am I. It is entirely possible that the "26 sick" was determined after all the passengers and crew were tested, and Secretary Azar may simply not have mentioned it. Or, there may be good reasons why testing was delayed. If so, that has not been in the news I have read.
Some enterprising reporter might ask Secretary Azar, "Have all passengers and crew aboard the Grand Princess been tested for Coronavirus yet? If not, why not, and if so, what were the results?" Those seem like obvious questions to me. Perhaps they have already been answered, but I have not heard the answers.