method wherein the Modified Vaccinia virus Ankara is selected from MVA 575 deposited at the European Collection of Animal Cell Cultures under the deposition number V00120707, {TAIL ~ MVA} 572 deposited at ECACC under the deposition number V94012707, and MVA BN deposited at ECACC under number V00083008, or a derivative of {HEAD ~ any such virus}; such a 
method wherein the Modified Vaccinia virus Ankara is selected from MVA 575 deposited at the European Collection of Animal Cell Cultures under the deposition number V00120707 , { TAIL ~ MVA } 572 deposited at ECACC under the deposition number V94012707 , and MVA BN deposited at ECACC under number V00083008 , or a derivative of { HEAD ~ any such virus } ; such a
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH