Sorry to hear you had this experience but happy to hear you're doing well now.
For anyone wondering, this is because of inflammation and possible scarring of the small air sacs in the lungs. It wouldn't really be noticeable in typical day-to-day activities, but upon exertion, you'd notice a change in your stamina and recovery. Depending on the individual, this impact could be minor or dramatic. And thus for some recovery will come in weeks and others many months.
So I won't guess how much Zadina was impacted, but I know it wasn't 0%.