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Morbidity among elderly persons aged ⩾60 years in mass children vaccination (M+OZ) and control (N+O) communities (overall data for December 2000–March 2002 and for August–September 2002)
ILI, Influenza-like illnesses; M, Mytishchi; OZ, Orekhovo-Zuevo; N, Naro-Fominsk; O, Odintsovo.
