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.
1 Bloodborne pathogens are bacteria and viruses that are transmitted by contact with human blood and other potentially infectious materials (such as semen, vaginal secretions) from an infected person. 2  Urine, feces, vomitus, and saliva are not known to transmit bloodborne pathogens unless they contain visible blood.