"Він дуже хворий і потребує багато догляду."

Переклад: He is very sick and needs much care.

[rodrumt]

he is very ill and needs a lot of treatment.
Зі словаря кембріджа:
treatment noun (MEDICAL CARE)
B2 [ C or U ] the use of drugs, exercises, etc. to cure a person of an illness or injury:
free dental treatment
Perhaps it's time to try a new course of treatment
This disease doesn't generally respond to (= improve as a result of) treatment.
There are various treatments for this complaint.