31.6 THE JOURNAL OF ALLZRGY 2. Pollen asthmatics respond slowly to filtered air treatment. In most cases only partial relief was obtained even after seven days’ oc- cupation of the ward. All asthmatics studied were decidedly more comfortable in filtered air. 3. Recurrence of symptoms was prompt on exposure to pollen, but in uncomplicated hay fever cases the personal efficiency was increased because of relief from pollen irritation dnring the eight to ten hours in the filtered air ward. 4. Prom our results,...
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