Infection control after craniectomy.

My son male 28 years old with RTA, had close reduction left hip, ORIF & suturing of laceration on 18 march. Right frontal kochers point EVD followed by midline suboccipital craniectomy of infarct on 20 march. For 10 days in ICU, shifted to ward, had second EVD on 14 march but inconsistent infection patient is still 100 %conscious, and responds to all Stimuli but occasional vomiting & fever and consistent headache, in a well known super speciality hospital in Gurgaon, Delhi India. Doctors advised further two weeks to treat infection which is almost 45 days till then. Please advise further course of action. 1. Is it normal to cure infection for so long after suboccipital surgery.2. Should we continue treatment there or shift to other place.