Tariq's little sister has the mumps. Tariq can't remember if he has had mumps or not, but he is feeling slightly feverish. How could Tariq's doctor determine if he is getting sick with mumps or if he has previously had mumps?

Through physical examination of salivary glands, its redness, swelling and a viral culture test.

Explanation:

mumps is a contagious viral infection, may transmitted through Tariq's sister.

and fever is one the best indication for swelling or any infection in the body.

cutting out negative people, changing their diets, exercising, taking off days from work or school, etc