Here is an example of what I'd expect to see if I stick to the notion that groups of letters (with or w/o a period amongst them) are words and any other character or space separates words.

Start with this:

cough/fever/chest congestion cough,fever s.t., headache st,fever viral sx's r/o viral syndrome s.t/sob sore throat sorethroat

End up with this:

cough fever chest congestion cough fever s.t. headache st fever viral sx s r o viral syndrome s.t sob sore throat sorethroat