o Establishment of national disease registries would be difficult o many provincial databases would have to be standardized, e.g., 14 different jurisdictions have 14 different ways of classifying vaccines ###>o Il pourrait s'avérer difficile de mettre en place des registres nationaux sur les maladies - il faudrait normaliser plusieurs bases de données provinciales, p.ex., les 14 administrations classifient les vaccins de 14 manières différentes.