My dad got the second dose of Covishield and now he's having some symptoms like fever, body aches, and a mild cough. It's been 11 days, and even though he isolated himself and started taking Azithromycin and Ivermectin, he's still feeling pretty sick. His HRCT chest scan shows ground glass opacities and some consolidation, mostly in the basal and subpleural areas, with a severity score of 1125. His oxygen levels are around 94-97. I'm really worried, and Im not sure what to do next. What should our course of action be?