PCT No. PCT/US95/17082 Sec. 371 Date Jun. 19, 1997 Sec. 102(e) Date Jun. 19, 1997 PCT Filed Dec. 22, 1995 PCT Pub. No. WO96/21000 PCT Pub. Date Jul. 11, 1996Chimeric, humanized and other IL-5 mAbs, derived from high affinity neutralizing mAbs, pharmaceutical compositions containing same, methods of treatment and diagnostics are provided.