Jianguo Zhao's research while affiliated with Guangdong Center for Disease Control and Prevention and other places

Publications (11)

Article
Full-text available
Background The incidence of rabies exposure is high and increasing in China, leading to an urgent demand of rabies post-exposure prophylaxis (PEP) clinics for the injured. However, the spatial accessibility and inequality of rabies-exposed patients to rabies PEP clinics is less known in China. Methods Based on rabies exposure data, PEP clinic data...
Article
Full-text available
Low human papillomavirus (HPV) vaccine uptake is a key barrier to cervical cancer elimination. We aimed to evaluate the health impact and cost-effectiveness of introducing different HPV vaccines into immunization programs and scaling up the screening program in Guangdong. We used a dynamic compartmental model to estimate the impact of intervention...
Article
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Background The non-pharmaceutical interventions (NPIs) against COVID-19 may have affected the transmission of hand, foot and mouth disease (HFMD). We aimed to assess the impact of the NPIs on HFMD in the high epidemic area of HFMD, Guangdong Province. Methods The data of HFMD cases, etiological information, and meteorological factors in Guangdong...
Preprint
BACKGROUND Background: From January 2020 to June 2022, strict public health interventions against COVID-19 were implemented in Guangdong Province, China. OBJECTIVE Objectives: This study aims to investigate the evolution of within- and between-city COVID-19 dynamics in Guangdong Province in this period. METHODS Methods: Data of COVID-19 cases and...
Article
Full-text available
Aedes albopictus (Diptera: Culicidae) is a mosquito from Asia that can transmit a variety of diseases. This paper aimed to explore the effects of temperature, relative humidity, and illumination on the entomological parameters related to the population growth of Aedes albopictus, and provide specific parameters for developing dynamic models of mosq...
Article
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Dengue remains an important public health issue in South China. In this study, we aim to quantify the effect of climatic factors on dengue in nine cities of the Pearl River Delta (PRD) in South China. Monthly dengue cases, climatic factors, socio-economic, geographical, and mosquito density data in nine cities of the PRD from 2008 to 2019 were coll...
Article
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Background In May 2021, the SARS-CoV-2 Delta variant led to the first local outbreak in China in Guangzhou City. We explored the epidemiological characteristics and spatial-temporal clustering of this outbreak. Methods Based on the 153 cases in the SARS-CoV-2 Delta variant outbreak, the Knox test was used to analyze the spatial-temporal clustering...
Article
Current persistent outbreak of COVID-19 is triggering a series of collective responses to avoid infection. To further clarify the impact mechanism of adaptive protection behavior and vaccination, we developed a new transmission model via a delay differential system, which parameterized the roles of adaptive behaviors and vaccination, and allowed to...
Article
Full-text available
Varicella is a rising public health issue. Several studies have tried to quantify the relationships between meteorological factors and varicella incidence but with inconsistent results. We aim to investigate the impact of temperature and relative humidity on varicella, and to further explore the effect modification of these relationships. In this s...
Article
Full-text available
What is already known about this topic?: Hong Kong Special Administrative Region (SAR), China and Singapore are both facing considerable Omicron variant epidemic. However, the overwhelmed medical system and high case fatality ratio (CFR) just occurred in Hong Kong SAR, China but not in Singapore. What is added by this report?: The low vaccinatio...
Article
Full-text available
Introduction: With the large-scale roll-out of the coronavirus disease 2019 (COVID-19) booster vaccination effort (a vaccine dose given 6 months after completing primary vaccination) in China, we explore when and how China could lift non-pharmacological interventions (NPIs) against COVID-19 in 2022. Methods: Using a modified susceptible-infectio...

Citations

... Once more, humidity appears to have conflicting effects on the spread of mosquito-borne diseases [39]. The increased relative humidity was associated with and increased survival rate of Aedes albopictus, but not Culex sp. in separate reports [31,40]. However, observed biting rates consistently relate to drier conditions [41,42]. ...
... • the Bulletin of Mathematical Biology proposed a special issue titled Mathematic and Covid 19 in which they analyzed in a general way the various aspects of COVID-19, from the forecasting of its evolution [1][2][3], to the strategy of vaccinations [4][5][6][7] and the effectiveness of different control strategies [8][9][10][11][12]. • the Journal of Theoretical Biology proposed a special issue titled Modelling COVID-19 and Preparedness for Future Pandemics specially focused on the different modeling techniques to better understand which is the best model to be used for each question and how good a model can be for disease prediction [13][14][15][16][17][18][19][20][21][22], better understand the cyclic phenomena shown in this pandemic [23][24][25][26][27][28][29], explore the roles of different virus strains and how to rapidly detect them [30][31][32][33][34], and relate social problems with the pandemic [35][36][37][38]. • even less specialized journals decided to devote particular attention to COVID-19, as the Journal of Mathematics in Industry that proposed the special issue Mathematical models of the spread and consequences of the SARS-CoV-2 pandemics. ...
... especially for people ≥ 70 years: 56.82% vs. 95.00%). Correspondingly, the case fatality ratio in Hong Kong SAR, China was higher than in Singapore (0.53% vs. 0.06%), especially for people ≥ 70 years (4.46% vs. 0.48%) [23]. As of 4 May 2022, only 25 out of 503 COVID-19 related deaths had received at least one dose of vaccine in Shanghai [5]. ...
... For example, nasopharyngeal temperature was around 33.2 C when ambient temperature was 25 C. 9 Many studies have uncovered the effects of ambient temperature, relative humidity (RH) or absolute humidity (AH) on various diseases, especially those of the circulatory or respiratory system or related to viruses. [10][11][12][13][14][15][16][17][18] These effects are usually nonlinear, typically "J" shaped or "U" shaped. Given the fact that NPC originates in the respiratory tract and is related to the virus, there might be a relationship between meteorological factors and the risk of NPC, which has not been studied before. ...
... The 2009 Influenza A (H1N1) pandemic witnessed extensive modeling to assess vaccination effectiveness and establish influenza surveillance systems (21)(22)(23)(24). The COVID-19 pandemic prompted accelerated development in theoretical epidemiology, with various models predicting trends, simulating transmission, and evaluating control measures to inform government decision-making (3)(4)(25)(26)(27)(28)(29)(30). Subsequently, theoretical epidemiology has focused on refining models and addressing previous limitations, such as real-time database optimization and dynamic modeling to monitor disease progress (31)(32). ...