Fever since past 6 days. This situation.

My father had taken first dose of covisheild vaccine 9 days back after which he experienced fever for two days which subsided on taking paracetamol. After a gap of one day fever started again which was about 100°F and was relieved on taking paracetamol. The fever came every 6-8 hours and has continued in this pattern for the past 6 days. He has taken Azithromycin and ivermectin for past 3 days and has started with doxycycline today. He has been taking supplemental vitamins and zinc and calcium with these medications. Since yesterday fever has been going slightly higher at 101°F and does not come down adequately even after paracetamol and requires cold sponging. He has taken covid rtpcr test and is awaiting results. His spO2 levels have remained at 96-97% steadily for the past 6 days and he doesn't have any associated symptoms except for the occasional cough. Kindly advice what else could be done in this situation.