Conventional assay systems for interferon.

The continuous appearance in the literature of new and modified assays for interferon indicates the lack of a universally acceptable assay. Recent reports show a tendency for simple, rapid, and economical assays with capabilities for the assay of interferons from many animal species. The EMC HA yield reduction assay, the neuraminidase yield reduction method, and the radiochemical assay have many desirable features. These assays have the potential of displacing the presently used conventional bioassays.