OCD can make us worry about anything, including worrying we’ll catch someone else’s traits. This is often based typically on whatever OCD theme is driving it.
OCD comes in many different shapes and flavors. One way it shows up is through the concept of “contamination.” Contamination means something different for each person who suffers from OCD, but they all have two things in common:
Something/someone cannot be touched and should be avoided
Contamination can spread from object to object, person to person (and even place to place)