Yeah, I mean there's still some disagreement on the percentage, just like there's plenty of disagreement on what percentage of people are actually asymptomatic. The viral loads peak either the day before or the day of symptom onset. It seems like the really infectious window is fairly short, maybe only 3 to 5 days.
There seems like there should be an effort to test all the staff daily nationally so that it has less of a chance of getting in these nursing homes.