The present study analyses the phenomenon of the migration to London o
f Italian intravenous drug users. Using structured questionnaires and
prevalence data it was estimated that a significant number of Italian
intravenous drug users (at kast 1000) were living in London at the tim
e of the study (1990), of whom 30% were HIV positive. Risk-taking beha
viour was disturbingly high. The reasons for migrating were identified
, and the implications of recent Italian legislation are briefly discu
ssed. The data indicated that the living conditions of these immigrant
s in London were precarious and that these vulnerable individuals had
little access to services. As the barriers to travel within the Europe
an Community disappear, the public health problems represented by the
migration of problem-drug users are likely to become more acute.