After losing her job, colleen not only felt stressed out but also repeatedly suffered annoying cold symptoms. this was most likely due to

Colleen's annoying cold symptoms were most likely due to lymphocytes. A lymphocyte is a type of white blood cell that is part of the immune system. There are two main types of lymphocytes: B cells and T cells. The B cells produce antibodies that are used to attack invading bacteria, viruses, and toxins.