Although no new cases were reported in 1929 the reason might have been the secrecy with which this whole issue was managed by the Queensland Health authorities and the inability of the health regime to locate and track down the source of infection.
Meskipun tidak ada kasus baru yang dilaporkan tahun 1929, alasannya keseluruhan masalah ini telah ditangani oleh pihak Kesehatan Queensland dan kemampuan pihak kesehatan untuk mencari sumber penyakit.