that HIV infection would occur following an injury from a needle discarded in a public place.”
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Here is the link to read more: http://www.cps.ca/documents/position/needle-stick-injuries
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https://www.nwhu.on.ca/Pages/NWHU-needle-exchange-program.aspx
A needle stick injury happens when a person's skin is pierced or stabbed with a needle (or other sharp object). This injury may put a person in contact with blood or
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https://www.nwhu.on.ca/ourservices/DrugAndAlcoholUse/Pages/SafeNeedleDisposal.aspx