Case study:
Peter Smith, a 19-year-old university student, was suffering from influenza and visited his local GP. He said he began to feel unwell two days earlier, and his condition had worsened since with an acute onset of a sore throat (pharyngitis). On examination, the following observations were made:
- Fever of 38.9 degrees Celsius
- Runny nose
- Sneezing
- Enlarged anterior cervical lymph nodes (lymphadenopathy)
Peter's throat was observed to have the following signs:
- Redness
- Swelling
- Having a patchy covering of yellow-white exudate over his tonsils
The doctor prescribed phenoxymethylpenicillin 500 mg twice per day for ten days.
Question:
Given that influenza is caused by a virus, why was Peter prescribed an antibiotic?