The risks of being sent an adulterated product or an unlicensed medicine, which may be a poison, are significant.

Russia said the ban on Moldovan -and Georgian -wine was linked to concerns over adulterated product that could harm consumers.

Many of them used small e-cigarette cartridges, or "carts," bought on the black market, where the risk of adulterated products is high.

Cleaning processes of manufacturing equipment are performed using a "validated" process and subsequently verified since inadequate cleaning can result in a contaminated or adulterated product.