Duration of Immune Response to Influenza Vaccination in Patients With RA

"Each participant will have a blood draw to measure the antibody titres influenza strains covered by the 2014-2015 influenza vaccine at three different time points:~Visit 1- Baseline/prior to vaccination Visit 2- 4-6 weeks post-vaccination Visit 3- end of influenza season (April-May)~At Visit 1, after the baseline blood draw, all participants will be vaccinated by Research staff in order to standardize the time from Baseline blood draw to vaccination. Participants aged 65 and older will be offered the extra strength version of the vaccine, which is usual care. Participants under the age of 65 will be given the usual strength vaccine. All patients will be given the intramuscular (IM) vaccine."