Prof Iain McInnes discusses the risk of herpes zoster in RA patients taking biologics and DMARDS. He also discusses reactivation of hepatitis B in patients with RA taking tofacitinib. Keep-up to date with the latest in arthritis and cytokine signalling with Prof Iain McInnes. Everything discussed is available in a more detailed slide format in the publications section at cytokinesignalling.com.