S.H.
LET him sleep. Do not wake him.
My son, has been known to sleep for 14 hours straight. When he was sick or going through a growth spurt.
This is when he was younger.
I let him, sleep.
I did not wake him even at meal times.
And it did NOT... make him be up all night.
He still slept, at his normal times.
Your son is very sick.
Sleep, actually allows the body to heal.
He needs... to sleep.
Let him.
Watch his symptoms... per the Pneumonia.
This is can be very serious. Good thing he is on antibiotics.
Recovering from it, can take a long time.