Assertive communication is important for good relationships and social health. Why would it be particularly important for someone with a chronic condition to have assertive communication skills when interacting with medical professionals?

Immunization is the introduction of a foreign substance to provoke  the immune response system.  immunizations are the same as vaccinations. it introduces foreign (but dead/ weakened) illnesses to train the body to fight against them. specific viruses and bacteria have specific antigens, antigens act sort of like name tags. these name tags the immune system recognize what's dangerous to the body and what's safe. 

Umm im gona keep to myself on that one