On a 1989
sabbatical he met
virologist Jian Zhou, and the two considered the problem of developing a vaccine for HPV – a virus that cannot be
cultured without living tissue. Frazer convinced Zhou to join him, and in 1990 they began to use
molecular biology to synthesize particles
in vitro that could mimic the virus. In March 1991 Zhou's wife and fellow researcher,
Xiao-Yi Sun, assembled by Zhou's instructions two
proteins into a
virus-like particle (VLP), resembling the HPV shell, from which
HPV vaccine would ultimately be made. which kill
about 250,000 women annually. Frazer and Zhou filed a
provisional patent in June 1991 and began work on developing the vaccine within UQ. To finance clinical trials, Australian medical company
CSL, and later
Merck, were sold partial patents. (CSL has the exclusive license to sell Gardasil in New Zealand and Australia, Merck the license elsewhere.)
GlaxoSmithKline independently used the same VLP-approach to develop
Cervarix, under a later US patent, licensing Frazer's
intellectual property in 2005. Later in 1991 the research was presented at a US scientific meeting, and Frazer became Director of the Centre for Immunology and Cancer Research at the University of Queensland (later renamed
The Diamantina Institute for Cancer, Immunology and Metabolic Medicine, where he held a personal chair as director). After three years in design,
Gardasil went into testing, and Frazer became a
professor in the university's Department of Medicine. In 1998 Frazer completed the first
human trials for Gardasil, and became an
Australian citizen. ==Pioneer Patent for VLPs and the HPV vaccine==