Cuddlers 2-4 hours, sitters exactly 3, touchers went into rooms for unknown period of time. Those rooms were previously inhabited by an infected baby. Infectious aerosols would still have been floating.
❌ Ventilation.
We don't know the ACH of the room each baby was in. Was it the same room even?
❌ Aerosol production. People produce more aerosols when yelling. A crying baby will produce more aerosols than a quiet baby.
This is particularly important as more cuddlers were
infected than touchers than sitters.
It should be noted that sitters are a test of far field aerosols.
❌ We also don't know if the sitters were sitting in a location that had a ventilation return grill between them and the baby. Would easily explain lack of far field
infection.
Cuddlers are a test of near field aerosols and droplets....and those subjects got the most sick. Which is typical of aerosols - this is why the UK CoVid Human Challenge declined to test aerosols.
Let's move on from that study which is cited by every IPC org.