Safety and immunogenicity of IMVAMUNE, a promising candidate as a third generation smallpox vaccine

Vaccine. 2006 Mar 15;24(12):2065-70. doi: 10.1016/j.vaccine.2005.11.022. Epub 2005 Nov 28.


A Phase I trial was performed to investigate the safety and immunogenicity of the third generation smallpox vaccine MVA-BN (IMVAMUNE), a highly attenuated clone derived from the Modified Vaccinia Virus Ankara strain 571, in naive and pre-immunized subjects. A total of 86 healthy subjects received the vaccine in five groups using different doses and routes of administration. All 38 subjects seroconverted in the groups receiving the highest dose (10(8) TCID50). All vaccinations were well tolerated with mainly mild or moderate pain at the injection site being the most frequent symptom. The results indicate that MVA-BN has the potential to be developed as an efficient and safe alternative to the conventional smallpox vaccines such as Lister-Elstree or Dryvax. Unique attributes render it a promising candidate for prophylactic mass immunization, even in subjects for whom conventional smallpox vaccines are contraindicated.

Publication types

  • Clinical Trial, Phase I
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Double-Blind Method
  • Humans
  • Immunization, Secondary*
  • Male
  • Middle Aged
  • Safety
  • Smallpox / prevention & control*
  • Smallpox Vaccine / administration & dosage*
  • Smallpox Vaccine / adverse effects
  • Smallpox Vaccine / genetics
  • Smallpox Vaccine / immunology
  • Vaccinia virus / immunology*


  • Smallpox Vaccine