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CT score of 17/25 is catagorised as severe disease. As he is admitted, he might be getting steroids and o2 support and remedesivir, Previously before 5 days the CT score was 5/25 . CT scan was taken early so score is less Rtpcr is negative because the viral phase is over and the lesions in the lung are due to our immune system attacking so it is immune response in our body , not due to virus , so rtpcr is negative

Spo2 below 90 in roomair is danger Rtpcr -ve doesnot mean covid is not der Hrct is 17/25 moderate disease 50% chance of eitherside may god bless u

HRCT Severity Ratings showing that Lung Involvement is increasing. More the Value, Less Good Outcome. Outcome depends on Patients General Health, Medications & Severity of the illness. Secondly, Worrying doesn't solve the problem.