Complete relative distribution of risk factors associated with acute HBV.^a

aDefining has been carried out in a pre-determined and re-iterative way: First, all exposures were ranked according to their potential to cause an acute HBV by a measure of transmission risk and the likely duration of exposure as follows: High = IDU, Sex with HBV and MSM, having a household HBV carrier or IDU, heterosexual exposure; Medium-High = Immigration, prison history, occupational exposure; Medium-low = tattoo or piercing; low = invasive medical procedures or non-injection drug use. Complete relative distribution of risk factors associated with acute HBV.a