Helen E Quinn

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When discrepant images are shown to the two eyes, each can intermittently disappear. This is known as binocular rivalry (BR). The causes of BR are debated. One view is that BR is driven by a low-level visual process, characterized by competition between monocular channels. Another is that BR is driven by higher level processes involved in interpreting(More)
OBJECTIVE To compare the impact of three strategies for delivering a booster dose of adult-formulated tetanus-diphtheria-pertussis (Tdap) vaccine to adolescents in Australia. These comprise: (i) administering Tdap to: a one-year age cohort; (ii) administering Tdap to the entire high school and to subsequent entrant cohorts; and (iii) administering Tdap to(More)
BACKGROUND Cross-sectional serosurveys using IgG antibody to pertussis toxin (IgG-PT) are increasingly being used to estimate trends in recent infection independent of reporting biases. METHODS/PRINCIPAL FINDINGS We compared the age-specific seroprevalence of various levels of IgG-PT in cross-sectional surveys using systematic collections of residual sera(More)
BACKGROUND Although recommended for almost a decade, evidence for field effectiveness of vaccinating close adult contacts of newborn infants against pertussis ("cocooning") is lacking. We evaluated the impact of a government-funded cocoon program during a pertussis epidemic in New South Wales, Australia. METHODS We matched all New South Wales(More)
Over the past decade the number of recommended and funded vaccines for adolescents has increased, becoming a substantial part of the National Immunisation Program in Australia. In response, NSW has implemented disease-specific vaccination campaigns for both children and adolescents and more recently established a routine high school-based vaccination(More)
The pertussis epidemic experienced in NSW in 2008-2009 was likely to be in part due to changes in diagnostic practice since 2007, which amplified disease notifications. We used population-based seroepidemiology as a less biased means of interpreting age-specific pertussis infection patterns in NSW from three serosurveys undertaken in 1997-98 (during an(More)
OBJECTIVE Data on the effectiveness of the diphtheria-tetanus-acellular pertussis (DTaP) vaccine in the first 4 years of life are sparse. We evaluated the vaccine effectiveness (VE) of 1 and 2 doses of DTaP before 6 months of age and of 3 doses from 6 months of age in Australia, where, since 2003, a fourth dose is not given until 4 years. METHODS We(More)
BACKGROUND There is limited information on the incidence, morbidity and risk factors for pertussis in adults, particularly those aged over 65 years. METHODS Population-based prospective cohort study of 263094 adults aged over 45 years (mean 62.8 years) recruited in the Australian state of New South Wales (the 45 and Up Study) between 2006 and 2008, and(More)
4 1. On 8 May 2003 the Queensland OzFoodNet epi-demiologist was notifi ed of a cluster of six cases of Salmonella Typhimurium phage type U307. A further nine cases were identifi ed the following day. S. Typhimurium phage type U307 is rare in Australia. Only 133 isolations from human sources have occurred since 1996 (National Enteric Pathogens Surveillance(More)