Is the conclusion that your daughter brought it in and maybe she was asymptomatic until 25th?
In this situation, I think there is a tendency to want answers, but unfortunately it is a patchwork of imprecise data and guesswork that is frustratingly short of real conclusions.
The main question to me is "Who caught it first and how?" At this point, I don't think we will ever know.
At first I thought it could be my daughter who brought it to our house from her apartment, but she swears that she isolated carefully for 2 weeks before coming to visit.
Also the timing of her arrival to my wife getting symptoms was just under 2 days which would be record time from exposure to having symptoms.
Add to that my daughter got a negative rapid test a couple days after my wife had symptoms, and then turning positive almost 2 weeks later, I think it highly unlikely that she had it first.
Given my negative PCR test, negative antibody test, and no symptoms, I think it likely I still haven't had it.
So, to me, most likely scenario is my wife caught it first (not sure exactly how), then spread it to my daughter, and I somehow avoided catching it from either of them.
The various tests are not totally accurate, and the timing exactly when you take those tests can make a big difference, so we are still left guessing if the tests results are helping tell the story correctly as well.
If you isolate yourself from your daughter and wife it should be possible to avoid it, you are still doing that? Is your wife/daughter still contagious (have no clue how long one can be contagious)?
So the combo of a positive PCR test and having symptoms is the most important data point in time for tracking. The health/medical establishment wants to know that for quarantine guidance. Currently they recommend at least 10 days of isolation after a positive PCR test result.
So my wife was on "official" quarantine Jan 15-Jan 25 and my daughter from Jan 25-Feb 4 (tomorrow). So in theory my daughter could still be contagious until tomorrow. She plans to return to her apartment this coming weekend.
The other thing they care about is known exposure. I am advised to isolate for at least 10 days after last known exposure. Since I had no symptoms and no positive test, my official countdown clock never started, so it is just exposrue+10 days so my isolation clock keeps moving forward.
If my antibody test had come back positive, I could have started my isolation clock from when I took that test (Jan 30th) but since it was negative I am still considered at risk of catching it now.
Basically I have to wait 10 more days after tomorrow since in theory I could have made it all this time without catching then catch it from my daughter on the last day she could be infectious.
How I (apparently) avoided catching it so far is a mystery. Well, I could have it right now, and still no symptoms, but unless I do daily PCR tests I can't even guess well about that.
After my wife got symptoms and positive PCR test at the start of all this I assumed I was "screwed" at that point since we had been sleeping in the same bed, etc, and she should have been contagious for days before symptoms.
But I went through the motions of wearing a mask in the house, washing hands more frequently, trying to stay in other rooms (I even switched to sleeping on the couch for the following 10 days). I also increased some dietary supplements of questionable effectiveness in case they could help reduce symptoms if I caught it. I started using xylitol nasal spray... Just an assortment of things I read about online that might help a little just in case. Maybe they actually stopped me from catching it... Or maybe I was just lucky, or had some genetic factor, or mystery protections in my immune system.
Being younger, healthier, and less paranoid about catching it, my daughter was less careful about trying to keep some distance from her symptomatic mom. So she was more exposed than I was, doing more of the care for my wife while she was resting in bed for some days before going to the hospital.
