Medical history and prior testing were reviewed.

Salazar said in the memo that the discovery provided "more evidence that prior testing requirements were inadequate."

Socio-demographic and behavioural predictors for willingness to be tested and self-reported prior testing were explored, using multivariate logistic regression.

From prior testing, Raquella knew the Harkonnen bloodlines could be suitable for a beneficial intermingling that the breeding computers had projected.

By unit, clients were similar in terms of median age (range 28-31), but differed in sex distribution, employment status, prior testing, and perceived HIV risk.

Prior testing had shown the stool donor to be free of acute infection or stool pathogens.