[1] CDC, Epidem Intelligence Serv, Atlanta, GA 30333 USA
[2] Calif Dept Publ Hlth, Sacramento, CA 95814 USA
[3] Tulare Cty Dept Hlth & Human Serv, Visalia, CA USA
[4] Alameda Cty Publ Hlth Dept, San Leandro, CA USA
[5] Kern Cty Publ Hlth, Bakersfield, CA USA
[6] Madera Cty Dept Publ Hlth, Madera, CA USA
[7] Merced Cty Dept Publ Hlth, Merced, CA USA
[8] Fresno Cty Dept Publ Hlth, Fresno, CA USA
[9] San Joaquin Cty Publ Hlth Serv, Stockton, CA USA
[10] Stanislaus Cty Hlth Serv Agcy, Modesto, CA USA
[11] CDC, Natl Ctr Immunizat & Resp Dis, Influenza Div, Atlanta, CA 30333 USA