In 2006, two patients were referred to our clinic for worsening shoulder pain following vaccine injections. Inflammation of the brachial plexus nerves was suspected, but we discovered a new condition affecting the shoulder. Our research and analysis helped us develop a treatment which resolved their pain and restored their function. The cases were published in the journal Vaccine in 2008. In 2015, the US Department of Health and Human Services recognized shoulder injury related to vaccine administration (SIRVA) as a compensable condition under the Vaccine Injury Program.