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Zitzmann-Roth, Eva-Maria; Sonnenburg, Frank von; Motte, Stephan de la; Arndtz-Wiedemann, Nathaly; Krempelhuber, Alfred von; Uebler, Nadine; Vollmar, Jens; Virgin, Garth und Chaplin, Paul (2015): Cardiac Safety of Modified Vaccinia Ankara for Vaccination against Smallpox in a Young, Healthy Study Population.
In: PLOS ONE 10(4), e0122653 [PDF, 307kB]

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Abstract

Background Conventional smallpox vaccines based on replicating vaccinia virus (VV) strains (e.g. Lister Elstree, NYCBOH) are associated with a high incidence of myo-/pericarditis, a severe inflammatory cardiac complication. A new smallpox vaccine candidate based on a nonreplicating Modified Vaccinia Ankara (MVA) poxvirus has been assessed for cardiac safety in a large placebo-controlled clinical trial. Methods Cardiac safety of one and two doses of MVA compared to placebo was assessed in 745 healthy subjects. Vaccinia-naive subjects received either one dose of MVA and one dose of placebo, two doses of MVA, or two doses of placebo by subcutaneous injection four weeks apart;vaccinia-experienced subjects received a single dose of MVA. Solicited and unsolicited adverse events (AE) and cardiac safety parameters (recorded as Adverse Events of Special Interest, AESI) were monitored after each injection. Results A total of 5 possibly related AESI (3 cases of palpitations, 2 of tachycardia) were reported during the study. No case of myo- or pericarditis occurred. One possibly related serious AE (SAE) was reported during the 6-month follow-up period (sarcoidosis). The most frequently observed AEs were injection site reactions. Conclusions Vaccination with MVA was safe and well tolerated and did not increase the risk for development of myo-/pericarditis.

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