mvdennehy May 5, 2007:

No termino de comprender bien la frase. ¿Podrías agregar más contexto?
Por si ayuda, mando la definición de Stedman's Online Medical Dictionary, 27th Edition: yield (yld)The amount or quantity produced or returned, often measured as a percentage of the starting material; e.g., a yield in an enzyme preparation is equal to the units of enzyme activity recovered at the end of the preparation divided by the total units observed in the starting material.

liz askew May 3, 2007:

I think you should understand the meaning first. See:
http://216.239.59.104/search?q=cache:n-iNx2xM41wJ:seekingalp...


As a reminder, the ULTRIO assay is approved in the US to screen donated blood for HIV-1 and hepatitis C virus, but not for hepatitis B virus. In order to gain a screening claim for hepatitis B, the FDA assessed to conduct a post-marketing study to detect two cases of HBV yield, meaning hepatitis B infected donations that were missed by serology testing.
Three blood screening sites representing more than 700,000 annual donations have committed thus far, complex protocols have been agreed to, and testing of live samples is expected to begin any day at the first site.
However, it's important to recognize that when we find the required yield cases is uncertain and beyond our control. Once blood banks find the yield, we need to submit the data to the FDA, which we understand could take us long as 4 to 6 months to review and update our label. We'll keep you posted as the studies progress.