The antisera are tested by ELISA as an internal quality control at day 28 (SuperFast) or at day 42 (Standard). Customized protocols varies. We recognize that quality and reliability are the most important to our customers, we never let an antiserum go out unless it has a minimum good titer (>20,000); when requested by the customer the extra ELISA assays for other bleeds will be charged according to the price list. It is also possible to test them by other methods, such as Western blotting and dot blot, with an extra charge.