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Qifang Bi
Johns Hopkins University
8Publications
6H-index
298Citations
Publications 8
Newest
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#1Qifang Bi (Johns Hopkins University)H-Index: 6
#2Fadhil M AbdallaH-Index: 1
Last.Andrew S. Azman (Johns Hopkins University)H-Index: 19
view all 15 authors...
1 CitationsSource
#1Stephen A. Lauer (UMass: University of Massachusetts Amherst)H-Index: 6
#2Krzysztof Sakrejda (UMass: University of Massachusetts Amherst)H-Index: 6
Last.Nicholas G. Reich (UMass: University of Massachusetts Amherst)H-Index: 6
view all 13 authors...
Dengue hemorrhagic fever (DHF), a severe manifestation of dengue viral infection that can cause severe bleeding, organ impairment, and even death, affects between 15,000 and 105,000 people each year in Thailand. While all Thai provinces experience at least one DHF case most years, the distribution of cases shifts regionally from year to year. Accurately forecasting where DHF outbreaks occur before the dengue season could help public health officials prioritize public health activities. We develo...
11 CitationsSource
#1Qifang Bi (Johns Hopkins University)H-Index: 6
#2Eva Ferreras (ISCIII: Instituto de Salud Carlos III)H-Index: 3
Last.Myron M. LevineH-Index: 111
view all 36 authors...
Summary Background Killed whole-cell oral cholera vaccines (kOCVs) are becoming a standard cholera control and prevention tool. However, vaccine efficacy and direct effectiveness estimates have varied, with differences in study design, location, follow-up duration, and vaccine composition posing challenges for public health decision making. We did a systematic review and meta-analysis to generate average estimates of kOCV efficacy and direct effectiveness from the available literature. Methods F...
36 CitationsSource
#1Justin Lessler (Johns Hopkins University)H-Index: 38
#2Cassandra T. Ott (Johns Hopkins University)H-Index: 3
Last.Lelia H. Chaisson (Johns Hopkins University)H-Index: 12
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Objective To estimate the timing of key events in the natural history of Zika virus infection.
47 CitationsSource
#1Justin Lessler (Johns Hopkins University)H-Index: 38
#2Lelia H. Chaisson (Johns Hopkins University)H-Index: 12
Last.Isabel Rodriguez-Barraquer (Johns Hopkins University)H-Index: 17
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BACKGROUND First discovered in 1947, Zika virus (ZIKV) received little attention until a surge in microcephaly cases was reported after a 2015 outbreak in Brazil. The size of the outbreak and the severity of associated birth defects prompted the World Health Organization (WHO) to declare a Public Health Emergency of International Concern on 1 February 2016. In response, there has been an explosion in research and planning as the global health community has turned its attention to understanding a...
179 CitationsSource
#1Justin Lessler (Johns Hopkins University)H-Index: 38
#2Cassandra T. Ott (Johns Hopkins University)H-Index: 3
Last.Lelia H. Chaisson (Johns Hopkins University)H-Index: 12
view all 10 authors...
Background Evidence suggests that Zika virus has driven a 10-fold increase in babies born with microcephaly in Brazil, prompting the WHO to declare a Public Health Emergency of International Concern. However, little is known about the natural history of infection. These data are critical for implementation of surveillance and control measures such as protecting the blood supply. Methods We conducted a systematic review and pooled analysis to estimate the distribution of times from Zika infection...
13 CitationsSource
#1Qifang Bi (Johns Hopkins University)H-Index: 6
#2Andrew S. Azman (Johns Hopkins University)H-Index: 19
Last.Justin Lessler (Johns Hopkins University)H-Index: 38
view all 8 authors...
Close interpersonal contact likely drives spatial clustering of cases of cholera and diarrhea, but spatial clustering of risk factors may also drive this pattern. Few studies have focused specifically on how exposures for disease cluster at small spatial scales. Improving our understanding of the micro-scale clustering of risk factors for cholera may help to target interventions and power studies with cluster designs. We selected sets of spatially matched households (matched-sets) near cholera c...
11 CitationsSource
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