If you live in (or plan to visit) an area infested by scorpions
, you can use the following procedure to make yourself immune to their venom:
Catch a centipede, and discard its head. Mash the rest, and then scratch your arm and wipe a bit of the juice on the scratch.
(This has been known to work and is not an old wives tale)
However, if you are not easily convinced by such ecclectic ideas, South African Vaccine Producers (http://www.savp.co.za) make a variety of vaccines and anti-toxins.