<prompt> Warthin- Finkeldey giant cells are seen inInfluenzaMumpsPneumoniaRubeola  <response>: Rubeola 518-A7thMEASLES RUBEOLA - Multinucleate giant cells Warthin- Finkeldey cells are also found in the lymphoid tissues of patientsVon Magnus - Phenomenon - due to the formation of incomplete virus particles lacking nucleic acid- seen in Influenza virus 