Thank you for your query.
From your mail I understand that you are concerned about the following:
for past two days.
2. Swelling which has subsided.
3. Blood counts.
Starting from the counts, the report is within normal limits. You mention that the swelling has subsided. As the doctor has examined and did not find anything wrong then let us wait and see. So the main concern is the fever. Let us wait for another 24-48 hours and with the treatment prescribed by your doctor it should become normal.
Regarding your apprehension with the death of a child in the community due to cancer, I can understand your plight. Cancers are of various types and affect people of all ages. I do not understand why are you thinking in those lines. Have faith in the treating doctor and all will be well.
I hope I have responded to your query to your satisfaction.
Wishing your son an early recovery.