Key points are not available for this paper at this time.
Influenza virus was recovered from aqueous suspensions by means of membrane filters. Separation of virus from bacterial mixtures was achieved and virus was recovered free from bacteria. Technics developed for this application of the use of membrane filters were presented. These technics were extended to the successful isolation of Asian influenza virus from clinical specimens made available for use in the study.
Theodore G. Metcalf (1961) studied this question.