humira can lowou ability to fight infectis, inuding tuberculosis. serious, sometim fatal infections and cancers, including mphoma, have happene. as have blood, liver and nervousystem problems, seris allergic reactions, and new or worseni heart failure. before treatment, get sted for tb. ere ain fungaloinfections, and if you ve hatb, hepatitib, have flu-like mptoms or sores.ecti don start hura if and if you ve hatb, u ha an infection. readr a w chapter?