{HEAD ~ The present invention} provides an attenuated virus which is derived from Modified Vaccinia Ankara virus and which is characterized by the loss of its capability to reproductively replicate in {TAIL ~ human cell lines} 
{ HEAD ~ The present invention } provides an attenuated virus which is derived from Modified Vaccinia Ankara virus and which is characterized by the loss of its capability to reproductively replicate in { TAIL ~ human cell lines }
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