Sexual behaviour is usually a very sensitive topic that is not given enough attention with respect to injecting drug use...DAI Interesting read...FIO Injecting drug use is fast becoming a trend in the developing parts of the world and it is interesting to note that this piece gives a good insight of sexual behaviour of persons who inject drugs in Northern Nigeria. AAI It is commendable to see that drug users have other needs that hitherto were not easily understood...CA Great work! OA