The final article in the MMR Special
(3 February, p 11)
states that MMR causes only four adverse reactions per 100,000 doses, and then appears
to contradict this by quoting a much higher (1 in 3000) risk of a seizure. The
first figure is based on the large Australian and Finnish studies mentioned
earlier in the MMR Special (p 9), which found that the risk of a seizure was
less than 1.5 in 100,000. The article failed to say that the figure of 1 in 3000
came from a different study, done in 1995 (The Lancet, vol 345, p 567). Thanks
to the readers who pointed out this inconsistency—Ed.
