I'm really worried about my uncle. He got over covid about 2 months ago, but he still isn't doing well. He was in the hospital and got steroids and medications like remedesivir and faviflu, and they said he had viral pneumonia. They let him go after 20 days, but now he's got this persistent fever around 99-100, and his oxygen levels are worrying me since theyre down to about 89. I checked his CRP, and it's sitting at 8. Even though his reports look clean, the CT scan shows some GGO formation. Whats freaking me out is when he moves, his oxygen can drop to as low as 73. Could you please give me some advice on what to do next?

Pulmonologist opinion is advised to the patient.