Back to school in Jan - JK sickies

My kid has been sick 10 times. So much so hes had a reactive lymph node that is going away. Im not sure i want to send him to school the first week so he doesnt get sick anymore or us parents who have also been sick a lot. I dont want the superflu or any other crazy thing from christmas travel these kids bring back. Am I bad for that? Ugh im really struggling with this decision. Would like some feedback from other parents here.