Stock Photo - Reportage on the vaccine research institute?s (vri) immunomonitoring platform. the vaccine research institute?s aim is to speed up the development of an hiv vaccine. it stems from the anrs?s (french national aids and hepatitis research agency) vaccine programme. research is carried out on the mononuclear cells in the blood. the lab receives blood samples from people who have, and haven?t had the vaccine. the researchers carry our flow cytometry in order to visualise the production of cytokine by t lymphocyte cells and the immune response. they can then analyse the difference between the samples before and after the vaccination. this allows the researchers to see which t lymphocyte cells react to the vaccine and which have acquired a better immune response.