Steve Rogers-
Steve can't get sick so whenever you are sick he doesn't worry about keeping his distance from you. He takes care of you, waiting on you hand and foot.

Tony Stark-
Tony hates being sick so if you ever get sick he immediately starts cleaning everything. He attempts to cook your favorite meals also but isn't very good at it

Bruce Banner-
Much like Tony, Bruce is a bit of a germaphobe. The minute you shows signs of a cold he starts disinfecting everything

Clint Barton-
Clint always makes sure to take you to a doctor, even if you insist that it's just a simple cold.

Thor Odinson-
Thor didn't quite understand mortal sickness at first, so when you were sick for the first time around him he was very confused. He quickly learned what to do and how to take care of you.

Loki Laufeyson-
At first Loki thought you were being over dramatic when you caught the flu. After a couple of days with no improvement he took you more seriously and immediately felt guilty for not realizing how bad sickness was sooner.

Bucky Barnes-
Bucky makes a surprisingly good and gentle nurse. He likes to give you massages when you aren't feeling well.

Pietro Maximoff-
When you get sick Pietro usually ends up sick as well because he can't stay away from you.

Peter Parker-
If you're home sick, Peter will typically skip class to come and visit you, bringing you food or small presents to cheer you up.

Peter Quill-
Quill has a large stash of medicines from all over the galaxy. He spares no expense with treatment when it comes to you.

Sam Wilson-
Sam will usually take you to the doctor and as soon as you come back, wrap you in a blanket and make you some food.