BBC Correspondent Hugh Schofield: The result was not unexpected

But their colleague, former Health Minister Edmond Herve, has been convicted for his role in the contamination of two people who were given HIV-tainted blood.

The court did not hand down a punishment to Mr Herve. Judge Christian Le Gunehec said that due to the length of the scandal, the former health minister had not benefited from the "presumption of innocence to which he is entitled".

Mr Herve condemned the court's decision and said that he had only done his duty as a minister.

Edmond Herve: Guilty but no sentence

"The decision of the court lacks courage. It didn't have the courage to completely acquit me and it didn't have the courage to really convict me," he said.

His superior at the time, former Social Affairs Minister Georgina Dufoix, was acquitted alongside Mr Fabius on charges relating to the deaths from Aids of five people, and the contamination of two others during a key period in 1985.

Mr Herve was convicted in connection with two of the seven cases.

The verdict followed 10 days of debate before the specially convened Court of Justice of the Republic - comprising a mixed panel of magistrates and 12 members of parliament.

The court was the first since World War II to try ministers for crimes allegedly committed while in office.

In France's biggest public health scandal, about 4,000 people, many of them haemophiliacs, were given blood infected with the virus.

Many of those contaminated have since died. In most cases they received transfusions before the link between HIV, Aids and blood was fully understood.

Charges

All three politicians were alleged to have delayed the introduction of a US blood-screening test in France until a rival French product was ready to go on the market.

Hugh Schofield reports on the end to a highly unusual and controversial trial

Ms Dufoix and Mr Herve were also accused of failing to order the warming of blood products to kill the virus.

The former health minister was also charged with failing to implement a directive advising against accepting blood from high-risk donors, notably homosexuals, drug addicts and prisoners.

During the hearings, Mr Fabius argued that any mistakes were made by his administration.

As prime minister he could not have had the expertise to decide on such a complicated issue as how to combat the still new disease of Aids.

Families' anger

Victims and their families were outraged at the ruling after waiting years for the ministers they saw as responsible to be brought to justice.

"Why don't you go ahead and give them the Legion of Honour while you're at it?" demanded Patrice Gaudin. His two sons had died after being contaminated with Aids-tainted blood.

And an association representing French people who have undergone blood transfusions denounced the acquittals as "dishonourable" and said the trial was "fixed".

The Association Francaise des Transfuses (AFT) denounced the "two-speed justice which makes some politicians untouchable".

It said that a forthcoming trial of the ministers' advisers would reveal "everything about the ministers that the Court of Justice tried to hide from the French people".