Background
: Despite of the medical importance and commercial value of adult immunization which is being embossed, immunization levels remain extremely low. One of the main reason for this may be physicians non-compliance and misinformation. The aim of this study is to provide reference data about primary physicians knowledge and attitude for adult immunization.

Methods : The questionnaire was composed of 29 items concerning physicians' knowledge and attitude for adult immunization and we mailed on November 26, 1995 to 1450 physicians of private clinics registered in Korean Medical Association in 1994, and then we analyzed 314(21.6%) question-naires which were returned to us within 3 weeks.

Results : Among 314 cases, according to their specialty, general physician 32(10.2%), internist group 166(52.9%), surgeon group 73 (23.2%), minority group 43(13.7%) in number. Recognition rate of each immunization was 95.2% for Hepatitis B, 87.4% for Influenza, 24.5% for Pneumococcs, 96% for Measles. Keeping rate was 83.4% for Hepatitis B, 72.6% for Influenza, 11.5% for Pneumococ-cus. In surgeon group, keeping rate of Hepatitis B vaccine was 85.3%, Influenza vaccine 54.7%. 179(57.2%) physicians answered "absolutely need" of "much important" about adult Influenza immu-nization for healthy life and elderly internist Yubgroup tended to emphasize the importance. roung internist subgroup tended to know more indications. 85(27.1%) physicians have recommended the immunization actively to their patients and their major obstacle to recommendation was "patients' negative attitude" and in internist group, "can not convinced efficacy of immunization" in surgeon group, "out of my duty" in minority group. Only 40(12.7%) physicians answered "absolutely need" or "much important" about adult Pneumococcal immunization. Also, young internist subgroup tended to know more indications. Only 27(87.9%) physicians have recommended Pneumococcal immunization actively to their patients and their major obstece to recommendation was "can not be convinced efficacy of immunization" in internist group, "can not identify the indications" in surgeon group, "out of my duty" in minority group. As many as 247(78.7%) phyicians answered "absolutely need" the Hepatitis B immunization for healthy life and 243(77.6%) have recommended actively to their patients and 76.0% of surgeon, 65.0% of minorities also have recommended Hepatitis B immunization, and their major obstacle to active recommendation was "patients negative attitude"

Conclusion : Since the main body of practicing immunization can not be limited to internist, education for adult immunization should be provided to all physician regardless of their specialty. Various adult immunization education programs are essential to eliminate patients negative attitude which, in turn, may improve physicians recommendation rate.