Abatacept Most Effective Early and in Seropositive RA A 2 year study evaluated the efficacy and safey (drug retention) of subcutaneous ABA in active RA and showed superior responses when ABA was given to biologic-naive and seropositive RA patients. https://t.co/WdZ3YCeGXg https://t.co/4ZjFFrVmSJ