<p><strong>Very common</strong>: Infections (including colds, sinusitis, bronchitis, urinary tract infections and skin infections); injection site reactions (including bleeding, bruising, redness, itching, pain, and swelling). Reactions at the injection site (these do not occur as often after the first month of treatment. Some patients have developed a reaction at an injection site that was used before.<br />
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<strong>Common</strong>: Allergic reactions; fever; itching; antibodies directed against normal tissue (autoantibody formation).<br />
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<strong>Uncommon</strong>: Serious infections (including pneumonia, deep skin infections, joint infections, blood infection, and infections at various sites); low blood platelet count; skin cancer (excluding melanoma); localized swelling of the skin (angio edema); hives (elevated patches of red or pale skin that often itch); eye inflammation; psoriasis (new or worsening); rash; inflammation or scarring of the lungs; inflammation of the blood vessels affecting multiple organs.</p>