Tony -

Being his usual germaphobe self, he avoided you and called for help

Steve -

He went into what you liked to call 'worried dad mode' and ran round like a mad man

Clint -

Got you everything you wanted

Bruce -

He created a new medicine to cure your illness

Thor -

He freaked out because he knew nothing about illnesses on Earth

Loki -

He just used magic to make you feel better, but you told him off for cheating