there four ways through which hiv
/253657?iL=true" >AIDS spreads
1. unsafe sex
3. sharing of needle (used needle)
4.hiv positive mother to child
there is 0.3% chance of getting infected with HIV if the shared needle was used previously for hiv positive patient .
so u now must have understood that there is small but definite risk of hiv through needle prick.
Take care ,dont panick.
best of luck.