[14] Cases in Tonga and Fiji have also been recorded, and an outbreak in Perth began in October 2019 after a New Zealander visited while infectious.

[17][18] Scientists have also criticised the Ministry of Health for not acting on previous recommendations to conduct national 'catch-up' campaigns with the MMR vaccine prior to the outbreak.

[20] Dr Nikki Turner, Chair of the National Measles Verification Committee, met in 2018 to discuss the immunisation gap.

[21] David Haymen and Turner concluded that the best way to close the immunity gap was to undertake a formal catch-up programme.

[23] Research also suggested management strategies such as a national campaign targeting the at-risk age groups; establishment of systems to ensure adequate supplies of vaccines; provision of support for their delivery at the practice level; and creative use of community facilities to improve accessibility.