It's weird. I believe this to be true when talking toddlers, because they seem to get one sickness after another at school/daycare.. But then as we age, elementary and upto even adults, we all seem to go back to work/classes/social situations at the tail end of our colds and yet we usually don't immediately catch something else, even tho other variants must be going around the class/office as there are usually 1-2 ppl (out of like 30) missing every week.

So as an adult, I kinda feel like post-cold, I have generally stronger overall immunity.. At least to the parent strain type (say, rhinoviruses)

My familiarity with them, the ppl and their winter season. I don't actually know if... say Texans or Morrocans get colds or seasonally

So ppl that get colds more than once per winter (north east USA, Canada) are catching a second different variant?