Human population growth serves as an important model for population ecologists, and is one of the most important environmental issues of the twenty-first century.
Confidence votes 1. no not all, blood-borne pathogens are typically found in the blood stream and any bodily fluid that can contain blood can contain a blood borne pathogen. these include urine, feces, saliva, sperm, vaginal secretions, and even tears.
Examples of diseases spread through blood or other body fluids: 1  hepatitis B-blood, saliva, semen and vaginal fluids. 2  hepatitis C-blood. 3  human immunodeficiency virus (HIV) infection-blood, semen and vaginal fluids, breastmilk.