How often do they call when you are both well?
Do they realise you would like inquiries or could they be afraid of disturbing you if you are resting?
I can't say whether they should or should not have called you, as this depends entirely on what kind of relationship you normally have with them.
Sorry if this is unhelpful. Could you ring up and ask if they have time to talk for a minute or two, as you are feeling fed up with being ill and need someone cheerful to talk to?
Is there anyone who still thinks that Israel's actions in Gaza are justifiable?