Congee does help with feeling full but when I'm really sick I just can't keep it in. I guess the it's easiest thing to swallow if you can barely eat, the basics of water, rice and salt keep the body going. Close people cooking it for you, the feeling of home is a lovely feeling.
The congee at restaurants are often way too flavourful and salty, not really for sick people. Still, food is very important for connecting to people.