Footnotes

• Contributors NWC designed the study and wrote the first draft of the letter. RWH provide the audit case details and revised the manuscript.

• Competing interests NWC has acted as chief investigators for epidemiological studies sponsored by vaccine manufacturers (CSL) and serological testing (Merck). All payments, including for sitting on advisory boards (Pfizer), are paid directly to an administrative fund held by Murdoch Childrens Research Institute. RWH has no conflicts of interest to declare.

• Ethics approval RCH Ethics committee.

• Provenance and peer review Not commissioned; internally peer reviewed.