Martyn Day, a solicitor for several of these men said that they were left to face "the most terrible future".
Parexel, a clinical research organization, which arranged the trials, on behalf of TeGenero, a German pharmaceutical company claims that all guidelines were followed.
One of the victims, Nav Modi, found out that his immune system was unlikely to be able to fight off serious illnesses, from independent tests carried out on him and three other victims, arranged by Mr Day.
He said, "I don't know what's going to happen the next day. Every time I go to bed I feel that I won't be able to see the sun tomorrow."
Following the drug TGN1412 trial Mr Modi suffered multiple organ failure and is now seeking compensation.
Mr Day, said: "The reality is that they're going to have to face the most terrible future prospect of the most serious cancers happening at any time, the prospect of serious diseases, the most terrible, terrible time."
The Medicines and Healthcare products Regulatory Authority (MHRA) had previously stated that Parexel failed to follow proper procedures. In addition it was found that there was no contract in place between TeGenero and Parexel at the beginning of the trial.
TeGenero has continuously claimed that the men's reactions were "completely unexpected" and did not reflect the results obtained from the earlier laboratory studies.