From the Document: "Since the SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2] virus can be detected in the blood (via serum blood testing), there is some confusion about whether that means it can be transmitted via blood as a bloodborne pathogen, like HIV or hepatitis C. SARS-CoV-2 is a novel virus, which means that humans do not have a natural ability to fight it off with their immune systems. It also means that there are a lot of scientific uncertainties about characteristics of the virus, including whether or not it is a bloodborne pathogen. We know that the virus primarily enters the body through the eyes, nose, or mouth and progresses into the lungs, where the most severe illness occurs. However, the virus replicates in cells, including the blood, and when it does, it alters the blood's environment. This disruption challenges healthy levels of critical elements like oxygen, nitrogen, iron, and others essential for normal body function."
National Institute of Environmental Health Sciences: https://www.niehs.nih.gov/