"It is interesting to note the changes in ‘incidence’ of these (Rubella) complications over the years. In 1980, the incidence of encephalitis was 1/100,000 clinical severe cases (NZ Med. J. August 13, 1980, p. 104), by 1985 it had climbed to 1/50,000 (J. Inf. 1985, p. 240), in 1989 it was 1/20,000 (NZ Med. J. 26 April 1989, p. 202). Now it is supposedly 1/6,000 (Krugman, 1998)..As with measles and mumps, the risk statistics of each era seem to alter to suit the medical opinion of the moment, dependant on whether there is a perceived need to further promote a "fix-it"."--Hilary Butler
"Something curious has happened to the "official" perception of the childhood diseases which are the subject of the MMR or MR vaccines (Measles, Mumps, Rubella). They have all officially become more serious since vaccines were introduced."--- Setting the illnesses in context