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