the absence of:

idly chatting
hugging
fawning over a new born
boisterous laughter
handshaking
bestowal of compliments
holding the door for someone
smiles
frowns
grumblers
neighbors' casual discussions  and catching up
blithely ignoring people
people to be  annoyed at
not feeling like a germ
no six feet of separation
children cavorting
no  apprehensions
no trepidations
rags in the check-out lanes