What is a biological sample?
A biological sample is defined as any substance of human or animal origin that is collected in order to be analyzed, in a way that serves to help establish the clinical diagnosis, prognosis and treatment of diseases. This type of sample can be analyzed in the reference center’s own laboratories or in other specialized external laboratories outside that center and chosen by the study promoter. To ensure proper transport of the same, the World Health Organization establishes the Regulations for the Transport of Infectious Substances.
Types of substances
Category A substance
They are those infectious substances that contain pathogens (viruses, parasites, bacteria, fungi, etc.) and can cause permanent damage or put life at risk, if exposure occurs.
Category B substance
All biological matter (serum, DNA without pathogens …) that does not meet the requirements to be part of category A is considered. Examples are blood, serum, DNA without pathogens.