Sorry to hear about your fathers ailment
Good to know that he is asymptomatic.
Infections can take time to clear up .
So, testing + is not a very big deal .
But the markers being raised is a concern .
I would like to know is there any cough or shortness of breath ?
What is the oxygen saturation?
Next Steps
1. Prone positioning
2. Rest and observation
3. Medications depending on symptoms and oxygen saturation