Clinical Case Study #$5$ Jackie was getting ready to go out for the evening when she noticed a red spot near her upper lip. She thought it was just a pimple so she covered it with makeup and went on her way. The next morning, she noticed that the spot was more blister$-$like and was a little bit painful. She called her doctor, who said she most likely had a fever blister or a cold sore. He told her to pick up some ointment at the pharmacy and to avoid close contact with other people $($i$.$e$.$ kissing or sharing utensils or drinks$).$ What is the likely cause of Jackie's cold sore?

Human Herpes Virus

Rubeola virus

Epstein Barr Virus

HIV