CDC influenza report no. 6, July 25, 1957

"The first isolation of Asian strain influenza virus from the southern tier of states has been reported from Corpus Christi. Airmen recently arrived from San Diego were initially involved. Confirmation of Asian strain influenza virus was also obtained from a ship at Norfolk, Virginia. Several outbreaks of influenza-like illness have been reported by homeward-bound Boy Scouts from the Jamboree. Crowding in railroad coaches again appears to have served as a ‘provoking factor’ for these outbreaks. Three California groups have been the most heavily affected, with sporadic cases reported among others. An outbreak of influenza-like illness has appeared among Mexican National migrant workers in California. Only a small group is presently affected. On hundred thousand are present in the state, living primarily in crowed, poorly sanitated labor camps. ‘Asian” has been suggested at a meeting in Geneva as a more exact designation for the recently isolated strains of influenza virus. Delegates from various countries thought the previous term ‘Far East’ not exact as to geographical location." - p. [2] ; I. Summary of information – II. Epidemic and case reports – III. Progress reports – IV. Influenza virus studies – V. Summary tables-cases and outbreaks ; Summary tables-cases and outbreaks: Table I. Confirmed outbreaks and cases of influenza due to Far East strains, United States, June 1-July 25, 1957 -- Table II. Unconfirmed influenza-like illness, outbreaks - United States, June 1-July 25, 1957 -- Table III. Outbreaks of febrile respiratory disease - etiology other than influenza or no specimens obtainable, June 1-July 25, 1957 -- Table IV. Reported influenza-like illness among returning delegates from Grinnell (Iowa) Conference through July 15, 1957 -- Table V. Reported outbreaks of influenza-like illness among Boy Scouts returning from Jamboree through July 25, 1957 (see CDC influenza progress report 6-E) ; "July 25, 1957." ...