No it isn't - brought over from South America where its found in the Brazilian Cottontail. For them it is really just a minor irritation, fatal to european rabbits (orytolagus corniculus).
D.
Erm, yes it is, www.myxomatosis.org.uk
What planet are they from?
Incorrect information put out as fact I'm afraid. The myxoma virus was around before man got 'clever' enough to manufacture viruses.
Intro'd in 1954 to the UK, a scourge ever since.
Addendum: First diagnosed and described in Uruguay in 1927, found naturally occuring in indigenous rabbit species.
Ps - if your gonna