Thierry Blanchon

ORCID: 0000-0001-9623-3906
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About
Contact & Profiles
Research Areas
  • Influenza Virus Research Studies
  • Respiratory viral infections research
  • COVID-19 epidemiological studies
  • Viral gastroenteritis research and epidemiology
  • Data-Driven Disease Surveillance
  • Vaccine Coverage and Hesitancy
  • Viral Infections and Vectors
  • Vector-borne infectious diseases
  • Pneumonia and Respiratory Infections
  • Herpesvirus Infections and Treatments
  • SARS-CoV-2 and COVID-19 Research
  • Hepatitis Viruses Studies and Epidemiology
  • COVID-19 Clinical Research Studies
  • Bacterial Infections and Vaccines
  • Viral Infections and Outbreaks Research
  • Health, Medicine and Society
  • Healthcare Systems and Practices
  • Workplace Health and Well-being
  • Suicide and Self-Harm Studies
  • Mental Health Treatment and Access
  • COVID-19 and Mental Health
  • Lung Cancer Diagnosis and Treatment
  • Wildlife Ecology and Conservation
  • Pharmaceutical Practices and Patient Outcomes
  • Viral Infections and Immunology Research

Inserm
2016-2025

Institut Pierre Louis d‘Épidémiologie et de Santé Publique
2016-2025

Sorbonne Université
2016-2025

Tour du Valat
2011-2024

Sorbonne Paris Cité
2019-2024

Centre d'Immunologie et des Maladies Infectieuses
2009-2020

Hôpital Saint-Antoine
2019

Assistance Publique – Hôpitaux de Paris
2003-2019

Université Paris Cité
2003-2016

UPMC Health System
2013-2015

Background Facemasks and respirators have been stockpiled during pandemic preparedness. However, data on their effectiveness for limiting transmission are scarce. We evaluated the of facemask use by index cases influenza large droplets produced coughing in households. Methodology Principal Findings A cluster randomized intervention trial was conducted France 2008–2009 season. Households were recruited a medical visit household member with positive rapid test symptoms lasting less than 48...

10.1371/journal.pone.0013998 article EN cc-by PLoS ONE 2010-11-17

Analysis of virological and clinical outcomes from a randomized trial that was terminated early suggest combined treatment seasonal influenza in adult outpatients with oseltamivir plus zanamivir is no more effective than either or monotherapy.

10.1371/journal.pmed.1000362 article EN cc-by PLoS Medicine 2010-11-02

The recent emergence of the SARS-CoV-2 in China has raised spectre a novel, potentially catastrophic pandemic both scientific and lay communities throughout world. In this particular context, people have been accused being excessively pessimistic regarding future consequences emerging health threat. However, consistent with previous research social psychology, large survey conducted Europe early stage COVID-19 epidemic shows that majority respondents was actually overly optimistic about risk...

10.31234/osf.io/364qj preprint EN 2020-03-08

Several French regions where coronavirus disease (COVID-19) has been reported currently show a renewed increase in ILI cases the general practice-based Sentinelles network. We computed number of excess by region from 24 February to 8 March 2020 and found correlation with COVID-19 so far. The data suggest larger circulation severe acute respiratory syndrome 2 (SARS-CoV-2) population than apparent confirmed cases.

10.2807/1560-7917.es.2020.25.14.2000326 article EN cc-by Eurosurveillance 2020-04-09

We measured COVID-19 vaccine effectiveness (VE) against symptomatic SARS-CoV-2 infection at primary care/outpatient level among adults ≥ 65 years old using a multicentre test-negative design in eight European countries. included 592 cases and 4,372 controls the main analysis. The VE was 62% (95% CI: 45–74) for one dose only 89% 79–94) complete vaccination. vaccines provide good protection presentation level, particularly fully vaccinated individuals.

10.2807/1560-7917.es.2021.26.29.2100670 article EN cc-by Eurosurveillance 2021-07-22

Unrealistic optimism, the underestimation of one’s risk experiencing harm, has been investigated extensively to understand better and predict behavioural responses health threats. Prior COVID-19 pandemic, a relative dearth research existed in this domain regarding epidemics, which is surprising considering that optimistic bias associated with lack engagement protective behaviours critical fighting twenty-first-century, emergent, infectious diseases. The current study addresses gap literature...

10.3390/ijerph19010436 article EN International Journal of Environmental Research and Public Health 2021-12-31

In primary care surveillance systems based on voluntary participation, biased results may arise from the lack of representativeness monitored population and uncertainty regarding denominator, especially in health where patient registration is not required.Based observation a positive association between number cases reported consultations by participating general practitioners (GPs), we define several weighted incidence estimators using external information consultation volume GPs. These are...

10.1186/s12963-014-0019-8 article EN cc-by Population Health Metrics 2014-07-25

Lyme borreliosis (LB) is the most frequent vector-borne disease in France. Since 2009, surveillance of LB conducted by a sentinel network general practitioners (GPs). This system, conjunction with national hospitalisation database was used to estimate incidence and describe characteristics France.To estimated trends GP consultations hospital admissions for France identify risk groups high-incidence regions.From 2011 2016, mean yearly rate cases 53 per 100,000 inhabitants (95% CI: 41-65)...

10.2807/1560-7917.es.2019.24.11.1800134 article EN cc-by Eurosurveillance 2019-03-14

<h3>Importance</h3> An increased risk of acute bacterial enteric infections has been reported among patients receiving proton pump inhibitor (PPI) therapy. The gastroenteritis (AGE) viral origin associated with continuous PPI exposure less studied. <h3>Objective</h3> To investigate the association between therapy and AGE occurrence during winter epidemic periods when circulation viruses is highest. <h3>Design, Setting, Participants</h3> A matched cohort study was performed using a...

10.1001/jamanetworkopen.2019.16205 article EN cc-by-nc-nd JAMA Network Open 2019-11-27

Abstract Data on the SARS-CoV-2 infection among primary health care workers (PHCWs) are scarce but essential to reflect policy regarding prevention and control measures. We assessed prevalence of PHCWs who have been infected by in comparison with modeling from general population metropolitan France, associated factors. A cross-sectional study was conducted practitioners (GPs), pediatricians, dental pharmacy between May August 2021. Participants volunteered provide a dried-blood spot for...

10.1038/s41598-024-55477-9 article EN cc-by Scientific Reports 2024-03-05

The increasing Internet coverage and the widespread use of digital devices offer possibility to develop new surveillance systems potentially capable provide important aid epidemiological public health monitoring research. In France, a nationwide system for influenza-like illness, GrippeNet.fr, was introduced since 2011/2012 season based on an online participatory mechanism open general population. We evaluate recruitment participation users first pilot with respect similar efforts in Europe...

10.1371/journal.pone.0073675 article EN cc-by PLoS ONE 2013-09-11

The Internet is becoming more commonly used as a tool for disease surveillance. Similarly to other surveillance systems and studies using online data collection, Internet-based will have biases in participation, affecting the generalizability of results. Here we quantify participation Influenzanet, an ongoing European-wide network participatory influenza-like-illness. In 2011/2012 Influenzanet launched standardized common framework collection applied seven European countries. participants...

10.1186/1471-2458-14-984 article EN cc-by BMC Public Health 2014-09-20

There is currently debate about human coronavirus (HCoV) seasonality and pathogenicity, as epidemiological data are scarce. Here, we provide clinical features of HCoV patients with acute respiratory infection (ARI) examined in primary care general practice. We also describe over six influenza surveillance seasons (week 40 to 15 each season) from the period 2014/2015 2019/2020 Corsica (France). A sample all ages presenting for consultation influenza-like illness (ILI) or ARI was included by...

10.3390/v12060630 article EN cc-by Viruses 2020-06-10
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