title: Medical papers related to keywords of vaccine and vaccination in KoreaMed database, Korea (1962-2012).
abstract: OBJECTIVE
  To describe the present status and changing patterns of medical papers related to keywords of vaccine and vaccination published in Korea over the last 50 years, and provide basic data for future studies.
  
  
  METHODS
  185,603 papers are registered in the medical database KoreaMed, which is run by Korean Association of Medical Journal Editors. Among these papers, a search with the keywords vaccine or vaccination revealed a total of 1,089 articles which were published on vaccine and/or vaccination during the period of September 2, 1962 to April 30, 2012. Our study endeavors to analyze these 1,089 articles.
  
  
  RESULTS
  Only one article published with the keywords vaccine and/or vaccination was published in the 1960s, and the number of journals steadily increased starting from the 1970s (24 articles) to 2 times, 10 times, 20 times in the 1980s, 1990s, and the 2000s (585 articles), respectively. The articles were classified into reviews (20.2%), original articles with clinical study (40.7%), original articles with experimental study (24.6%), and case reports (8.2%). The review articles mainly dealt with an overview. The original articles with clinical study were on epidemiology, effect and immunogenicity, clinical trial. Original articles with experimental study were mainly comprised of complication and overview. Articles on vaccine, pathogen or disease topics were mostly microorganisms such as bacteria or viruses, and studies on anti-cancer vaccines or vaccines of specific diseases were sparse.
  
  
  CONCLUSIONS
  The above data reflects the clinical uses of vaccines in Korea and the history of vaccine studies. The number of vaccine-related articles is increasing rapidly since the first article was published in 1962. This implies that with the increase of studies of clinical trials, clinical uses and results and analyses of the results, articles relating to basic studies are also on the rise. We intend these findings to be of use to researchers in this active and expanding field.
authors.affiliation: Department of Pediatrics, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Myung Hee
authors.initials: MH
authors.lastname: Han
authors.forename: Hee Young
authors.initials: HY
authors.lastname: Ju
authors.forename: Kyung Suk
authors.initials: KS
authors.lastname: Lee
authors.forename: Sung-Ho
authors.initials: SH
authors.lastname: Cha
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Lee
authors.forename: Chong-Woo
authors.initials: CW
authors.lastname: Bae
keywords: Journals; KoreaMed; Medical papers; Medline; PubMed; Vaccination; Vaccines