Mother's please help! What should I do?

Kids are always sick and if one is sic the whole house usually gets it. Especialy if she goes to school. Its normal, so dont think its not. Have her get in the routine of washing her hands more often and keeping her hands out of her mouth. Your over reacting. This is seriously normal for little kids to get sick. When shes sick just try to keep her away from the baby. Thats all.