The best definition of vehicle of contamination is Any source of biological contamination.
A vehicle of contamination is any object, substance, or surface that can carry or transfer pathogens or other forms of biological contamination from one place to another. This can include anything from hands and clothing, to food and water, to equipment and materials used in healthcare or other settings.
Biological contamination can be caused by various forms of microorganisms, such as bacteria, viruses, fungi, and parasites, as well as by toxins and other harmful substances produced by these microorganisms. Vehicles of contamination can spread these pathogens or contaminants from one person or location to another, potentially leading to the transmission of infections or other health problems.
It is important to be aware of potential vehicles of contamination and to take steps to prevent the spread of biological contamination, such as washing hands frequently, using protective barriers and personal protective equipment, and properly cleaning and disinfecting surfaces and equipment.