Is this normal behavior in a marriage?

So me and my husband are currently separated. We decided it was best to live apart while we try to work through things. Well me and my kids all got sick and he wont come help take care of us cause he doesnt wanna get sick. Is that normal? Hes always been like this done the bare minimum if im sick. Am i wrong for thinking he should come help me its extremely hard to take care of 3 kids even before being sick. Am i wrong for being mad he wont come help? We were on pretty decent terms before this