Well, there's the rub. No one seems to know, even today, how long after exposure you become contagious. That's especially the case for asymptomatic spreaders

Well, there's the rub. No one seems to know, even today, how long after exposure you become contagious. That's especially the case for asymptomatic spreaders (as we assume the child was, if the child was the source for the parent). Everyone seems to say "1-2 days before symptoms start", although some sources say "2-3 days". And yes, as you say, the 2-14 days for becoming symptomatic seems to be much more agreed upon. That's where it seems to me to be a very rapid spread (below average) from the wedding to the LTCF. But not impossible. I was also curious about the situation around the LTCF in the days leading up to that outbreak. I was expecting to find that perhaps there were other community cases around there that could have contributed to the LTCF. However, looking at the MeCDC website for Somerset County (where the LTCF is reported to be located), the county seemed to be pretty "under control" in the days leading up to this event. The most recent confirmed cases had been over 2 weeks prior, on July 24th. It's actually the longest they had gone without a new case in almost 3 months. Given that, I'm more likely (as the CDC concluded) to suspect the contact tracing from the wedding to the LTCF as being the cause. It's not an absolute link, but it's probably more likely than I originally assumed.