The use of normal human immunoglobulin (NHIG) for public health purposes in Queensland 2004-2014 and Australia 2014-2016

Objective To describe the use of normal human immunoglobulin (NHIG) recommended for public health purposes in Queensland and Australia. Methods Queensland public health unit (PHU) data on notified cases of measles, rubella and hepatitis A from 2004 to 2014 were examined; particularly regarding the number of contacts offered NHIG and the volume recommended per contact. The National Blood Authority (NBA) provided unidentified data from NHIG order form inception (June 2014) through December 2016. Queensland orders were compared to PHU data where the data timeframes overlapped. Results NHIG usage varied by condition. For hepatitis A, usage declined after the introduction of vaccination for contacts in 2010. Usage fluctuated across the study period for measles and was not recommended for rubella. Average volumes per contact for hepatitis A and measles were 1.6mL and 11.9mL respectively based on PHU data. PHU data approximated NBA data on NHIG usage for hepatitis A and rubella contacts. Calculated volumes of NHIG per measles contact were also similar, but PHU data underestimated the number of measles contacts for whom NHIG was ordered. Discussion This study is the first to document the use of NHIG for public health purposes in Australia. Results will be valuable for national blood sufficiency planning and cost effectiveness studies in the event of alterations to NHIG dosage recommendations.