Assessing the Use of Certolizumab Pegol in Adult Subjects With Rheumatoid Arthritis on the Antibody Response When Receiving Influenza Virus and Pneumococcal Vaccines

Placebo - Two 0.9% saline subcutaneous (sc) injections at Week 0, Week 2, and Week 4 followed by two sc injections of Open-Label (OL) CZP 200 mg at Weeks 6, 8 and 10, then one sc injection of OL CZP 200 mg every two weeks from Week 12 until last drug administration (up to Week 32).

Certolizumab pegol - Two 200 mg subcutaneous (sc) injections at Week 0, Week 2, and Week 4 followed by one sc injection of Open-Label (OL) CZP 200 mg from Week 6 until last drug administration (up to Week 32).