This took place on a former slave owner's cotton plantation-turned-prison in Arkansas, Cummins state farm.

From the 1960s to the 1980s, the prison's most profitable product was the blood plasma harvested from inmates.

Prisoners were paid a small fee, while the plasma was sold for around $100 to the drug industry.

Despite knowing that the blood was infected, officials allowed its use.

Cummins was one of several American prisons supplying plasma and its extracts globally, including Britain.

Impoverished individuals, including drug addicts and those with sexually transmitted diseases, were recruited as donors.

The plasma was highly profitable, referred to as "liquid gold." However, mistakes were made throughout the production process, leading to deadly consequences.

Disturbing reports have emerged about the donation process at Cummins, where donors allegedly lacked access to sinks, clinical scrubs, or gloves.

The text describes allegations of unsanitary conditions and misconduct in two American prisons where plasma donations were taken.

The bleeding rooms were reportedly filled with blood on the floor, and screening procedures were ignored.

At a Louisiana prison, witnesses claimed they saw people using intravenous drugs and having sex before donating, and the clotting agents extracted from the plasma were later used to treat haemophilia patients in Britain.

Overall, the text suggests that there were serious concerns regarding the hygiene and ethical practices of these plasma donation centers.