Six hundred students have been put at risk of HIV and hepatitis because a healthcare worker failed to followed correct clinical procedures.
Past and present students at the University of Derby - who had either vaccinations or blood tests - have been advised to attend screenings for the infections to ensure they have not been infected.
The advice was given after an investigation was opened into the safety of procedures carried out by a member of staff who was formerly contracted to provide services within the Occupational Health Service at the university.
Experts at NHS England have said the actions of a healthcare worker put students at risk of HIV and hepatitis B and C.
The worker involved failed to change the syringe barrels which needles are attached to between each patient.
This oversight occurred over a period of eight years putting 606 students at risk.
The affected patients are those that were seen by the healthcare worker between September 2005 and October 2013.
Dr Doug Black, Medical Director, NHS England Derbyshire and Nottinghamshire said: ‘This investigation has taken place as it is understood that, whilst syringe needles were always changed between patients, the syringe barrels to which the needles attach were being reused in the administration of vaccinations.
‘This also occurred during blood taking, where a single use holder for a blood collection tube was reused but needles changed.
‘Therefore, there is an extremely low possibility these errors may have put people at risk of infection from hepatitis B, hepatitis C or HIV.
‘With this in mind, as a precaution, we have reviewed all available university health records and the 606 people identified have all been contacted and invited to attend a blood test at their local hospital or via their GP.’
He added: ‘We are extremely sorry for the undoubted worry and concern people we are contacting may feel on receiving this news.
‘I would however like to stress that the risk is extremely low and would encourage all those we contact, who may not already have been screened after their time at the university, to present themselves for blood testing.