highly significantp < 0.0001
χ 2 test comparison of incidence and prevalence over the periods 2007 to 2014 (mean incidence 1.01/10,000, mean prevalence 0.88/10,000) and 2015 to 2021 (mean incidence 0.67/10,000, mean prevalence 0.33/10,000) showed a highly significant decrease ( p < 0.0001).