A Matter of WHO
- Joer: 1961
- Land: United Kingdom
- Genre: Mystery, Crime, Drama
- Studio: Foray
- Schlësselwuert: outbreak, epidemic, smallpox
- Direkter: Don Chaffey
- Besetzung: Terry-Thomas, Sonja Ziemann, Alex Nicol, Richard Briers, Honor Blackman, Guy Deghy