Understanding parental decisions to decline or delay infant RSV immunisation, nirsevimab, in Western Australia in 2024

Factors shaping parents' decline or delay decisions included concerns as to the safety and potential side effects of nirsevimab, lack of knowledge or under-estimation of disease risk and burden of RSV, reasoning based on alternative risk mitigation strategies and conditions, and following healthcare provider advice. This study is one of few globally, and the first if its kind in Australia, to use qualitative methods to deeply explore parental decline or delay of infant RSV immunisation. Its significant contribution to knowledge can aid strategic improvements in rollout and maintenance of infant RSV immunisation programs in Australia and globally.