Practices related to vaccines and transfusions aren't free of risk as regards complications and undesired effects. The no. 210/92 law lays down payments to people who are damaged in consequence of the administration of obligatory vaccines, transfusions and haemoderivatives. Our study valued law's sticking, analysing applications for payment sent in by damaged people to some ASL of Lazio and Abruzzo, in the period 1992-2000.