Problem: Provide a brief definition of immunodeficiency. List four external methods of protecting the body from infection. List four healthy living strategies to help improve the immune system. Write short answer in proper Australian English and to compose answer can take help from the guide CHCCCS041 Learner Guide - High Res v1.1 (ID 202251).pdf, and other resources but do not copy or plagiaries the answer from the guide or other sources, also change the wording. Need Assignment Help?