RE: INFANTS
The infants couldn’t see expressions due to the masks.
No smiles or giggles for those poor babies.
And they are not interacting with other family and friends, being cuddled and sung to, so important.
I remember a study done many years ago with monkeys.
One just given basic care without much interaction, other held, cuddled and loved.
It was disastrous for the deprived monkey.