Thanks Andy and Manal,
He had a blood test this morning - his hemoglobin after 2 1/2 weeks was only 89 - which is to be expected because of his fever. The good news is that his blood glucose was 4.9 (I guess that would be 88.2 mg/dL. That is a relief. Andy, you were right - the spike in the ambulance was due to fever and dehydration.
Thank you:)
Sharmin