What happened in the UK's infected blood scandal from the 1970s to '90s?

abcnews.go.com:

The final report of the U.K.’s infected blood inquiry has been published, six years after it started its work

LONDON — The final report of the U.K.'s infected blood inquiry was published on Monday, nearly six years after it began looking into how tens of thousands of people contracted HIV or hepatitis from transfusions of tainted blood and blood products in the 1970s and 1980s.

The scandal is widely seen as the deadliest to afflict Britain's state-run National Health Service since its inception in 1948, with around 3,000 people believed to have died as a result of being infected with HIV and hepatitis.

The report criticized medical practitioners, civil servants and politicians, though many have already died given the passage of time. It's also set to pave the way to a huge compensation bill that the British government will be under pressure to rapidly pay.

Had it not been for the tireless campaigners, many of whom saw loved ones die decades too soon, the scale of the scandal may have remained hidden forever.

“This whole scandal has blanketed my entire life,” said Jason Evans, who was 4 when his father died at the age of 31 in 1993 after contracting HIV and hepatitis from an infected blood plasma product.

“My dad knew he was dying and he took many home videos, which I’ve got and replayed over and over again growing up because that’s really all I had,” he added.

Evans was instrumental in the decision by then-Prime Minister Theresa May to establish the inquiry in 2017. He said he just “couldn’t let it go.” His hope is that on Monday, he and countless others, can.

Here is a look at what the scandal was about and what the report's impact may be.

In the 1970s and 1980s, thousands of people who needed blood transfusions, for