P3.021 Seroepidemiology to Evaluate Chlamydia Screening Programmes: Results from Two Surveys of Pgp3 Antibody in Residual Stored Serum Samples in England
P3.021 Seroepidemiology to Evaluate Chlamydia Screening Programmes: Results from Two Surveys of Pgp3 Antibody in Residual Stored Serum Samples in England