... an attack of influenza, but among them only 1000 lived in affected houses. in contrast with this , 1/5th of the tuberculosis persons who did not have influenza were still exposed to infection. altogether 20000 were attacked by influenza and 37000 were exposed to infaction but the number who having influena but not tuberculosis lived in houses where no other case of influenza occured was only 4000. redraft this infomation in a concise tabular form