disabled.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A place for people who are chronically ill, mentally ill, disabled, and friends/families/allies to come together, meet, share knowledge and random banter, and just about anything else.

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Two of my proudest were actually relatively small.

I worked with the students union at a local university to give student free access to drug testing kits. This allowed them to test the content and purity of drugs they had bought and intended to take.

The other is the drug market profile I created that same year, looking at the diversion of prescription drugs into clandestine markets.