Answer: SELF TREATMENT.
Explanation: Self treatment is an act of medication of oneself without the advice of a professional medical personnel to treat a real or assumed illness.
Most self medications can easily be obtained over the counter and doesn't require a doctor's prescription.
For a case like Marc's, the best option is to use self medication because even medical personnel advice that if symptoms persist after 3 days, visit a physician. The only thing noted that Marc has is a fever which is characterized by high body temperature. Which is not a very serious ailment.
