1 Never use a microwave or conventional oven to pre-heat your flask. 2  If your flask has not been used for some time, rinse with warm water to remove any residual odours.  DO NOT overfill your flask. Leave sufficient space in the neck to fit the stopper.
Prevalence is a measure of disease that allows us to determine a person's likelihood of having a disease. Therefore, the number of prevalent cases is the total number of cases of disease existing in a population.
Pertaining to, or furnishing, a diagnosis; indicating the nature of a disease. n. 1. The mark or symptom by which one disease is known or distinguished from others. Adj. 1. diagnostic - concerned with diagnosis; used for furthering diagnosis; a diagnostic clinic; a diagnostic reading test; diagnostic information.