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Public Health England (PHE) conducts routine surveillance for all vaccine preventable diseases and publishes Health protection Reports on a quarterly or annual basis online on Gov.uk. The Health Protection Report Laboratory confirmed cases of measles, mumps and rubella, England: January to March 2018 is attached as an example.
PHE evaluates vaccine effectiveness for its programmes and generates evidence in the form of peer reviewed publications on a regular basis. For example, prior to the introduction of routine immunisation against diphtheria in 1942, there were 50,804 reported cases in 1941 across England and Wales. This fell to one laboratory confirmed case in 2014, representing a 99.9% reduction. In 1967, before the introduction of routine measles immunisation, there were 460,407 reported cases in England and Wales. This declined to 377 laboratory confirmed cases in 2017, representing a 99.9% decline. More recently, in 1999 at the time of introducing a national programme against Group C Meningococcal disease, there were 883 confirmed cases. By 2014, this had declined to 28 confirmed cases – a reduction of 97%.