@linyujing 是为了减少社会影响。瘾君子不管怎么样都会给自己扎针的,如果找不到干净的针头,就会用和别人共用针头,这样这些人的感染几率会很高。如果有sharp container, 乱扔针头会损害公众,比如清洁工,或者不懂事的青少年。所以加拿大很多地方都有免费干净针和sharp containers. https://twitter.com/jun_zhong/status/1236575757289369600
https://t.me/private_channel_c14370a/3704
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