All I can say is that if something was wrong with the batch, if the source was the cause of the issue, where are all the others infected from the contaminated batch??? Obviously MANY factors can cause an issue -- we have no way to know his techniques, if he properly sterilized location and vial, if needle is clean (what it may have touched of been exposed to, even a few seconds in the air if some coughs or sneezed on it etc), when he pushes air into vial to create back pressure did he contaminate the vial, how does he store it, does he wipe with clean new alcohol and let completely dry, does he wipe across from dirty area into cleaned location dragging germs to the pin site.. etc.. No one, not even himself, can know every factor with certainty. We will never know with certainty what/why he had an issue. But one thing we can ALL know for sure is that if the batch was bad then others using it would have the same issue. What does he want the source to do anyway? if he thinks the product is at fault, why would he want any more products? free products would not help. Does he want a source to pay his doctors bills? have we ever saw such a thing from any source??? Not going to happen, ever, from any source. Even without testing, I am confident is was not a contaminated batch by the pure logic that it would be an epidemic of similar situations from others if the source was at fault. I know the source suggests testing, but I personally disagree that it is even relevant because any contamination would have occurred AFTER the customer was in possession or we would have others with the same issue. Isolated issue with one individual; to me that proves it is something other than the product. I feel bad for him, it sucks, and none of us like stuff to happens to our brothers/peers. However, it is a risk we all take by doing injections.