If i don't have a fever with a upper resritory infection does that mean i'm not contagious?

No: Not all respiratory infections cause a fever, you can still be contagious. Use proper hand washing or sanitizing, cover your mouth when you sneeze or cough to avoid spreading illness. Take care!

Fever develops: After virus replicates and infects you, is your body fighting against it. The virus could be spread even before the fever.

No it does not.: Not all upper respiratory infections lead to fever.

No: You could still be contagious with or without a fever.