The Infection Was Already There: What Historical Hepatitis C Research Tells Us.
Historical hepatitis C research shows the virus was circulating long before routine screening was introduced. That matters for people infected through blood transfusions decades ago, particularly where medical records are missing, incomplete or destroyed. For families, the practical impact can be severe. A missing record may mean having to reconstruct events from old letters, partial hospital notes, family recollections or later diagnoses. That can delay recognition, complicate compensation claims and force relatives to prove events that happened decades earlier. This article looks at what the historical evidence tells us — and why absence of paperwork should not automatically be treated as absence of infection.
By Anonymous · Sep 28, 2026
**“A destroyed file should not rewrite history. Missing paperwork is not proof that an infection never happened.”**
For many families affected by the infected blood scandal, one of the hardest problems is not necessarily what happened medically. It is proving what happened decades later.
Records have been lost. Hospital files have been destroyed. Transfusion details may be incomplete. Some people were never told they had been exposed to hepatitis C until many years after the event that may have infected them.
But historical research tells us something important: hepatitis C did not suddenly appear when testing for it became available.
The infection was already there.
A study published in 2002 examining hepatitis C prevalence in England and Wales concluded that the majority of hepatitis C infections were probably acquired before 1986. Researchers analysed stored blood samples from different periods and found evidence suggesting an established burden of infection well before routine screening of donated blood was introduced.
That conclusion matters because hepatitis C itself was not identified until 1989.
Before then, doctors had already recognised that some patients developed hepatitis following blood transfusions even though tests for hepatitis A and hepatitis B were negative. The condition was generally described as “non-A, non-B hepatitis”.
Government guidance issued in 1995 acknowledged this history directly. It stated that it had been recognised for many years that a viral infection following blood transfusion could cause both acute and chronic hepatitis despite negative tests for hepatitis A and B. Once hepatitis C was identified in 1989, antibody testing became possible.
Routine screening of UK blood donations for hepatitis C did not begin until 1 September 1991.
That left a long period during which people could have been infected through transfusion without anyone being able to record their diagnosis as “hepatitis C” at the time.
Later surveillance provides another important piece of the picture.
A study examining hepatitis C testing between 1992 and 1996 reported that, among transfusion recipients tested during a survey in early 1995, hepatitis C antibodies were found in 11 of 418 people who had been transfused before 1985, compared with 14 of 1,441 people transfused after 1985.
Those figures should be handled carefully.
They do **not** mean that 2.6% of the entire UK blood supply was infected. They relate to the particular transfusion recipients tested in that study.
But they do demonstrate something significant: hepatitis C infection was being detected among people who had received blood many years before routine screening existed.
That historical context becomes particularly important when families are now trying to reconstruct individual cases.
Someone transfused in the 1970s or 1980s may have no surviving blood bag number, donor record or complete hospital file. Their notes may instead contain abnormal liver tests, unexplained hepatitis, jaundice, later liver disease or a hepatitis C diagnosis recorded years afterwards.
That does not automatically prove that a particular transfusion caused their infection.
Historical population research cannot establish the route of infection for one individual person.
But equally, missing paperwork does not mean the infection could not have occurred.
The Government itself recognised limitations in the hepatitis C lookback exercise.
When the national lookback process was developed, it initially concentrated on donors who had given blood before September 1991 and who subsequently returned to donate after screening had begun and were then found to be hepatitis C antibody positive.
Officials decided not to attempt to trace donors who had never returned to a transfusion centre, considering the work disproportionate.
The 1995 guidance was explicit that the lookback would therefore not identify everyone who had received potentially infectious blood before screening began.
That is a crucial point.
A person not being identified through the lookback process was never the same thing as proving their transfusion was safe.
The Infected Blood Inquiry later examined the delay surrounding hepatitis C lookback in detail. It found that the subject had repeatedly been raised and deferred, and that there had been little appetite for a national programme because of cost and resource implications.
A UK-wide hepatitis C lookback did not begin until 1995 — around three and a half years after routine blood screening had started.
By then, some patients had already spent years unaware that they might have been infected.
For families dealing with compensation claims today, these historical facts have a very practical consequence.
They may be asked to demonstrate an infection route from a period when hepatitis C could not yet be specifically diagnosed, when blood was not routinely screened for the virus and when the later system designed to trace infected recipients was itself incomplete.
Some families are therefore trying to prove, decades later, something the health system did not fully record at the time.
That is why historical evidence matters.
It provides context.
It shows that hepatitis C existed within the population before routine screening. It confirms that transfusion-associated hepatitis was recognised before the virus had a name. It shows that people receiving blood before September 1991 could have been exposed, and it confirms that the later lookback process could not identify every recipient of potentially infectious blood.
None of this means that every historic transfusion caused hepatitis C.
Individual claims still require individual evidence.
But where records have disappeared, the evidence that remains should be considered alongside what was medically and historically possible at the time.
A destroyed file should not rewrite history.
A missing donor record should not automatically become evidence that there was no infected donor.
And the absence of a hepatitis C diagnosis in records written before hepatitis C could even be identified should never, by itself, be treated as proof that infection was absent.
For some families, the paperwork may never tell the entire story.
The historical evidence can at least help explain why.