A multiple perspective approach helps historians reconstruct a record of a society.
Cardio" refers to the heart and "vascular" refers to the blood vessels .
The reason for this is that we can trace bloodbourne diseases back to a direct source, we an collect samples, and identify an approximate, if not exact, number of people infected. The problem with airbourne disease is that air doesn't stop moving. We can't measure the exact number of people who inhaled the specific portion of infected air, who then breathe it in another location, and may transmit more of the pathogens in that area.
Put simply, bloodbourne pathogens are more confined, spread less quickly, and are easier to track than airbourne ones.
They may turn the things such as Meth and Heroin. This is because they do not get the feeling they want from the pain pills anymore.
