¿Todavía estás enfermo? would be the best way to ask "Are you still sick" in Spanish.
estoy enferma-o
Yo siento enfermo
casa is how you say home in spanish.(for example) Nos vamos a la casa.
casa is the way you say home in Spanish. (for example) Nos vamos a la casa.
Yo no estoy en casa is the best way to say "I am not home" in Spanish.
You could say "No me gusta cuando estás enfermo/a".
If you are talking about the ill, Enfermo in the correct word to use.
You can say "I am sick of the recession" or "Jaime had to stay home from school today because she was sick with the flu."
mi primo Nina esta enferma
son casa
You can say 'Ayudo en casa.'