Search Results - "Crowcroft, Natasha S."

The basic reproduction number (R0) of measles: a systematic review by Guerra, Fiona M, Bolotin, Shelly, Lim, Gillian, Heffernan, Jane, Deeks, Shelley L, Li, Ye, Crowcroft, Natasha S

“…The basic reproduction number, R nought (R0), is defined as the average number of secondary cases of an infectious disease arising from a typical case in a…”
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Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection by Kwong, Jeffrey C, Schwartz, Kevin L, Campitelli, Michael A, Chung, Hannah, Crowcroft, Natasha S, Karnauchow, Timothy, Katz, Kevin, Ko, Dennis T, McGeer, Allison J, McNally, Dayre, Richardson, David C, Rosella, Laura C, Simor, Andrew, Smieja, Marek, Zahariadis, George, Gubbay, Jonathan B

“…Patients who had a positive laboratory test for influenza were six times as likely to be hospitalized for acute myocardial infarction during the 7 days after…”
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Evaluation of post-introduction COVID-19 vaccine effectiveness: Summary of interim guidance of the World Health Organization by Patel, Minal K., Bergeri, Isabel, Bresee, Joseph S., Cowling, Benjamin J., Crowcroft, Natasha S., Fahmy, Kamal, Hirve, Siddhivinayak, Kang, Gagandeep, Katz, Mark A., Lanata, Claudio F., L'Azou Jackson, Maïna, Joshi, Sudhir, Lipsitch, Marc, Mwenda, Jason M., Nogareda, Francisco, Orenstein, Walter A., Ortiz, Justin R., Pebody, Richard, Schrag, Stephanie J., Smith, Peter G., Srikantiah, Padmini, Subissi, Lorenzo, Valenciano, Marta, Vaughn, David W., Verani, Jennifer R., Wilder-Smith, Annelies, Feikin, Daniel R.

“…Phase 3 randomized-controlled trials have provided promising results of COVID-19 vaccine efficacy, ranging from 50 to 95% against symptomatic disease as the…”
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Causes of encephalitis and differences in their clinical presentations in England: a multicentre, population-based prospective study by Granerod, Julia, MSc, Ambrose, Helen E, DPhil, Davies, Nicholas WS, PhD, Clewley, Jonathan P, PhD, Walsh, Amanda L, MSc, Morgan, Dilys, MD, Cunningham, Richard, FRCPath, Zuckerman, Mark, FRCPath, Mutton, Ken J, MBBS, Solomon, Tom, Prof, Ward, Katherine N, PhD, Lunn, Michael PT, FRCP, Irani, Sarosh R, MRCP, Vincent, Angela, Prof, Brown, David WG, Prof, Crowcroft, Natasha S, MD

“…Summary Background Encephalitis has many causes, but for most patients the cause is unknown. We aimed to establish the cause and identify the clinical…”
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Waning of measles maternal antibody in infants in measles elimination settings – A systematic literature review by Guerra, Fiona M., Crowcroft, Natasha S., Friedman, Lindsay, Deeks, Shelley L., Halperin, Scott A., Severini, Alberto, Hatchette, Todd F., Bolotin, Shelly

“…•Most infants are born immune to measles through maternal antibodies, which decay.•In measles elimination settings, infant immunity wanes earlier.•We conducted…”
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Measles outbreaks demand systems-level action locally, nationally and globally by Crowcroft, Natasha S., MD(Cantab), Bolotin, Shelly, PhD

“…Reports of measles outbreaks are appearing in the news more frequently as we start to face an unfortunate emerging public health problem with no easy solution…”
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Improving estimates of pertussis burden in Ontario, Canada 2010-2017 by combining validation and capture-recapture methodologies by McBurney, Shilo H, Kwong, Jeffrey C, Brown, Kevin A, Rudzicz, Frank, Wilton, Andrew, Crowcroft, Natasha S

“…An underestimation of pertussis burden has impeded understanding of transmission and disallows effective policy and prevention to be prioritized and enacted…”
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Comparison of measles IgG enzyme immunoassays (EIA) versus plaque reduction neutralization test (PRNT) for measuring measles serostatus: a systematic review of head-to-head analyses of measles IgG EIA and PRNT by Lutz, Chelsea S, Hasan, Alvira Z, Bolotin, Shelly, Crowcroft, Natasha S, Cutts, Felicity T, Joh, Eugene, Loisate, Stacie, Moss, William J, Osman, Selma, Hayford, Kyla

“…As countries move towards or achieve measles elimination status, serosurveillance is an important public health tool. However, a major challenge of…”
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Diphtheria in the postepidemic period, Europe, 2000-2009 by Wagner, Karen S, White, Joanne M, Lucenko, Irina, Mercer, David, Crowcroft, Natasha S, Neal, Shona, Efstratiou, Androulla

“…Diphtheria incidence has decreased in Europe since its resurgence in the 1990s, but circulation continues in some countries in eastern Europe, and sporadic…”
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New estimates of incidence of encephalitis in England by Granerod, Julia, Cousens, Simon, Davies, Nicholas W S, Crowcroft, Natasha S, Thomas, Sara L

“…Encephalitis causes high rates of illness and death, yet its epidemiology remains poorly understood. To improve incidence estimates in England and inform…”
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Maternal varicella antibodies in children aged less than one year: Assessment of antibody decay by Bolotin, Shelly, Hughes, Stephanie L, Savage, Rachel D, McLachlan, Elizabeth, Severini, Alberto, Arnold, Callum, Richardson, Susan, Crowcroft, Natasha S, Deek, Shelley, Halperin, Scott A, Brown, Kevin A, Hatchette, Todd, Osman, Selma, Gubbay, Jonathan B, Science, Michelle

“…Objectives To investigate maternal antibody levels to varicella in infants <12 months of age in Ontario, Canada. Study design In this study, we included…”
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Risk of Guillain-Barré syndrome after seasonal influenza vaccination and influenza health-care encounters: a self-controlled study by Kwong, Jeffrey C, Dr, Vasa, Priya P, MD, Campitelli, Michael A, MPH, Hawken, Steven, MSc, Wilson, Kumanan, MD, Rosella, Laura C, PhD, Stukel, Therese A, Prof, Crowcroft, Natasha S, MD(Cantab), McGeer, Allison J, Prof, Zinman, Lorne, MD, Deeks, Shelley L, MD

“…Summary Background The possible risk of Guillain-Barré syndrome from influenza vaccines remains a potential obstacle to achieving high vaccination coverage…”
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Population-Level Impact of Ontario's Infant Rotavirus Immunization Program: Evidence of Direct and Indirect Effects by Wilson, Sarah E, Rosella, Laura C, Wang, Jun, Le Saux, Nicole, Crowcroft, Natasha S, Harris, Tara, Bolotin, Shelly, Deeks, Shelley L

“…To evaluate the direct and indirect population impact of rotavirus (RV) immunization on hospitalizations and emergency department (ED) visits for acute…”
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Progress Toward Regional Measles Elimination — Worldwide, 2000–2019 by Patel, Minal K, Goodson, James L, Alexander, James P., Jr, Kretsinger, Katrina, Sodha, Samir V, Steulet, Claudia, Gacic-Dobo, Marta, Rota, Paul A, McFarland, Jeffrey, Menning, Lisa, Mulders, Mick N, Crowcroft, Natasha S

“…What is already known about this topic? All six World Health Organization (WHO) regions have a measles elimination goal. What is added by this report? During…”
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Increasing pneumococcal vaccine uptake in older adults: a scoping review of interventions in high-income countries by Kirubarajan, Abirami, Lynch, Meghan, Nasreen, Sharifa, Gebretekle, Gebremedhin B, Fadel, Shaza A, Crowcroft, Natasha S, Allin, Sara

“…There is low uptake of the pneumococcal vaccination in eligible older adults, even in high-income countries that offer routine and universal vaccination…”
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Measles Serosurveys: A Solution in Search of the Right Problem by Ariyarajah, Archchun, Crowcroft, Natasha S.

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Under-reporting of pertussis in Ontario: A Canadian Immunization Research Network (CIRN) study using capture-recapture by Crowcroft, Natasha S, Johnson, Caitlin, Chen, Cynthia, Li, Ye, Marchand-Austin, Alex, Bolotin, Shelly, Schwartz, Kevin, Deeks, Shelley L, Jamieson, Frances, Drews, Steven, Russell, Margaret L, Svenson, Lawrence W, Simmonds, Kimberley, Mahmud, Salaheddin M, Kwong, Jeffrey C

“…Under-reporting of pertussis cases is a longstanding challenge. We estimated the true number of pertussis cases in Ontario using multiple data sources, and…”
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Encephalitis, Ontario, Canada, 2002-2013 by Parpia, Alyssa S, Li, Ye, Chen, Cynthia, Dhar, Badal, Crowcroft, Natasha S

“…Encephalitis, a brain inflammation leading to severe illness and often death, is caused by >100 pathogens. To assess the incidence and trends of encephalitis…”
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Rotavirus vaccine coverage and factors associated with uptake using linked data: Ontario, Canada by Wilson, Sarah E, Chung, Hannah, Schwartz, Kevin L, Guttmann, Astrid, Deeks, Shelley L, Kwong, Jeffrey C, Crowcroft, Natasha S, Wing, Laura, Tu, Karen

“…In August 2011, Ontario, Canada introduced a rotavirus immunization program using Rotarix™ vaccine. No assessments of rotavirus vaccine coverage have been…”
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Demonstration of background rates of three conditions of interest for vaccine safety surveillance by Wormsbecker, Anne E, Johnson, Caitlin, Bourns, Laura, Harris, Tara, Crowcroft, Natasha S, Deeks, Shelley L

“…Adverse events following immunization (AEFIs) are unwanted or unexpected health outcomes following vaccination, which may or may not be causally-linked to…”
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