Uptake of the triple MMR vaccine, for measles, mumps and rubella, fell dramatically after a now-discredited report linked it to autism in 1998. Vaccination rates are increasing steadily across Britain, but London is bucking the trend, with uptake of the second booster vaccination declining. About 77 per cent of children have had the first dose - compared with 87 per cent nationally - with only 57 per cent receiving two doses. This is far below the 92-95 per cent cover needed to prevent an outbreak.