Helen Ayles

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All published works

Action	Title	Year	Authors
+	Pandemic burden in low-income settings and impact of limited and delayed interventions: A granular modelling analysis of COVID-19 in Kabwe, Zambia	2024	Pablo N. Perez‐Guzman Stephen Longa Chanda Ab Schaap Kwame Shanaube Marc Baguelin Sarah Nyangu Muzala Kapina Kanyanga Patrick Walker Helen Ayles Roma Chilengi
+	Pandemic Burden in Low-Income Settings and Impact of Limited and Delayed Interventions: A Granular Modelling Analysis of COVID-19 in Kabwe, Zambia	2024	Pablo N. Perez‐Guzman Stephen Longa Chanda Ab Schaap Kwame Shanaube Marc Baguelin Sarah Nyangu Muzala Kapina Kanyanga Patrick Walker Helen Ayles Roma Chilengi
+ PDF Chat	Creating access to SARS-CoV-2 screening and testing through community-based COVID-19 case-finding, observations from cross-sectional studies in Lesotho and Zambia	2023	Eveline Klinkenberg Bulemba Katende María Rupérez Moniek Bresser Bxyn Kangololo Justin Bwalya R.M. Erhardt Ab Schaap Nkatya Kasese Thomas Gachie
+ PDF Chat	SARS-CoV-2 seroprevalence and associated risk factors in periurban Zambia: a population-based study	2022	Kwame Shanaube Ab Schaap Eveline Klinkenberg Sian Floyd J Bwalya Maina Cheeba Petra de Haas Barry Kosloff María Rupérez Richard Hayes
+ PDF Chat	The High Burden of Tuberculosis (TB) and Human Immunodeficiency Virus (HIV) in a Large Zambian Prison: A Public Health Alert	2013	German Henostroza Stephanie M. Topp Sisa Hatwiinda Katie R. Maggard Winifreda M. Phiri Jennifer B. Harris Annika Krüüner Nathan Kapata Helen Ayles Chisela Chileshe
+ PDF Chat	ZAMSTAR, The Zambia South Africa TB and HIV Reduction study: Design of a 2 × 2 factorial community randomized trial	2008	Helen Ayles Charalambos Sismanidis Nulda Beyers Richard Hayes Peter Godfrey‐Faussett
+	Restricted randomization of ZAMSTAR: a 2 × 2 factorial cluster randomized trial	2008	Charalambos Sismanidis Lawrence H. Moulton Helen Ayles Katherine Fielding Ab Schaap Nulda Beyers Ginny Bond Peter Godfrey‐Faussett Richard Hayes

Common Coauthors

Coauthor	Papers Together
Ab Schaap	5
Kwame Shanaube	4
Richard Hayes	3
Sarah Nyangu	2
Eveline Klinkenberg	2
Katharina Hauck	2
Pablo N. Perez‐Guzman	2
Patrick Walker	2
Muzala Kapina Kanyanga	2
María Rupérez	2
Nulda Beyers	2
Stephen Longa Chanda	2
Charalambos Sismanidis	2
Peter Godfrey‐Faussett	2
Marc Baguelin	2
Sian Floyd	2
Edward Knock	2
Roma Chilengi	2
Anne Cori	2
Robert Verity	2
Barry Kosloff	1
Katie R. Maggard	1
Stewart E. Reid	1
German Henostroza	1
Bulemba Katende	1
Maina Cheeba	1
Thomas Gachie	1
‘Mota J. ‘Mota	1
Chisela Chileshe	1
Sisa Hatwiinda	1
Winifreda M. Phiri	1
Jennifer B. Harris	1
Petra de Haas	1
Moniek Bresser	1
Nathan Kapata	1
Katherine Fielding	1
Ginny Bond	1
Bxyn Kangololo	1
Annika Krüüner	1
Stephanie M. Topp	1
Lawrence H. Moulton	1
Justin Bwalya	1
Nkatya Kasese	1
R.M. Erhardt	1
J Bwalya	1
Klaus Reither	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+ PDF Chat	Prevalence of SARS-CoV-2 in six districts in Zambia in July, 2020: a cross-sectional cluster sample survey	2021	Lloyd Mulenga Jonas Z. Hines Sombo Fwoloshi Lameck Chirwa Mpanji Siwingwa Samuel Yingst Adam Wolkon Danielle T. Barradas Jennifer Favaloro James Exnobert Zulu	3
+ PDF Chat	Adherence to and enforcement of non-pharmaceutical interventions (NPIs) for COVID-19 prevention in Nigeria, Rwanda, and Zambia: A mixed-methods analysis	2022	Hiwote Solomon Donald M. Thea Sandro Galea Lora Sabin Daniel R. Lucey Davidson H. Hamer	2
+	Design and analysis issues in cluster-randomized trials of interventions against infectious diseases	2000	Richard Hayes Neâl Alexander S. Bennett Simon Cousens	2
+ PDF Chat	A New Framework and Software to Estimate Time-Varying Reproduction Numbers During Epidemics	2013	Anne Cori Neil M. Ferguson Christophe Fraser Simon Cauchemez	2
+ PDF Chat	Simple sample size calculation for cluster-randomized trials	1999	Richard Hayes S. Bennett	2
+	Covariate-based constrained randomization of group-randomized trials	2004	Lawrence H. Moulton	2
+ PDF Chat	The impact of COVID-19 and strategies for mitigation and suppression in low- and middle-income countries	2020	Patrick Walker Charles Whittaker Oliver J. Watson Marc Baguelin Peter Winskill Arran Hamlet Bimandra A. Djafaara Zulma M. Cucunubá Daniela Olivera Mesa William D. Green	2
+	Long-term strategies to control COVID-19 in low and middle-income countries: an options overview of community-based, non-pharmacological interventions	2020	Rajiv Chowdhury Shammi Luhar Nusrat Khan Sohel Reza Choudhury Imran Matin Oscar H. Franco	2
+ PDF Chat	A global database of COVID-19 vaccinations	2021	Edouard Mathieu Hannah Ritchie Esteban Ortiz-Ospina Max Roser Joe Hasell Cameron Appel Charlie Giattino Lucas Rodés-Guirao	2
+ PDF Chat	Key epidemiological drivers and impact of interventions in the 2020 SARS-CoV-2 epidemic in England	2021	Edward Knock Lilith K. Whittles John A. Lees Pablo N. Perez‐Guzman Robert Verity Richard G. FitzJohn Katy A. M. Gaythorpe Natsuko Imai Wes Hinsley Lucy Okell	2
+ PDF Chat	PREVALENCE AND PREDICTORS OF STRESS AMONG COVID-19 HEALTH WORKERS IN KABWE DISTRICT- A CROSS SECTIONAL STUDY	2021	Leah Mukwasa Richard Mutemwa M. Zambwe Emmy Nkhama Peter J. Chipimo	2
+ PDF Chat	SARS-CoV-2 seroprevalence and associated risk factors in periurban Zambia: a population-based study	2022	Kwame Shanaube Ab Schaap Eveline Klinkenberg Sian Floyd J Bwalya Maina Cheeba Petra de Haas Barry Kosloff María Rupérez Richard Hayes	2
+ PDF Chat	Estimating excess mortality due to the COVID-19 pandemic: a systematic analysis of COVID-19-related mortality, 2020–21	2022	Haidong Wang Katherine Paulson Spencer A Pease Stefanie Watson Haley Comfort Peng Zheng Aleksandr Y. Aravkin Catherine Bisignano Ryan M Barber Shazia Alam	2
+ PDF Chat	Estimating the COVID-19 infection fatality ratio accounting for seroreversion using statistical modelling	2022	Nicholas F. Brazeau Robert Verity Sara Jenks Han Fu Charles Whittaker Peter Winskill Ilaria Dorigatti Patrick Walker Steven Riley Ricardo Parolin Schnekenberg	2
+ PDF Chat	COVID-19 in the 47 countries of the WHO African region: a modelling analysis of past trends and future patterns	2022	Joseph Cabore Humphrey Karamagi Hillary Kipruto Joseph Kyalo Mung’atu James Avoka Asamani Benson Droti Regina Titi-Ofei Aminata Binetou-Wahebine Seydi Solyana Ngusbrhan Kidane Thierno Baldé	2
+ PDF Chat	Underestimated COVID-19 mortality in WHO African region	2022	Debbie Bradshaw Robert Dorrington Tom A. Moultrie Pam Groenewald Harry Moultrie	2
+ PDF Chat	Global SARS-CoV-2 seroprevalence from January 2020 to April 2022: A systematic review and meta-analysis of standardized population-based studies	2022	Isabel Bergeri Mairead Whelan Harriet Ware Lorenzo Subissi Anthony Nardone Hannah C. Lewis Zihan Li Xiaomeng Ma Marta Valenciano Brianna Cheng	2
+	Lessons from COVID-19 for rescalable data collection	2023	Sangeeta Bhatia Natsuko Imai Oliver J. Watson Auss Abbood Philip AbdelMalik T. Cornelissen Stéphane Ghozzi Britta Lassmann Radhika Nagesh Manon Ragonnet‐Cronin	2
+ PDF Chat	Spatio-temporal dynamic of the COVID-19 epidemic and the impact of imported cases in Rwanda	2023	Muhammed Semakula François Niragire Sabin Nsanzimana Eric Remera Christel Faes	2
+ PDF Chat	Estimating the impact of COVID-19 vaccine inequities: a modeling study	2023	Nicolò Gozzi Matteo Chinazzi Natalie E. Dean Ira M. Longini M. Elizabeth Halloran Nicola Perra Alessandro Vespignani	2
+ PDF Chat	Alternative epidemic indicators for COVID-19 in three settings with incomplete death registration systems	2023	Ruth McCabe Charles Whittaker Richard Sheppard Nada Abdelmagid Aljaile Ahmed Israa Zain Alabdeen Nicholas F. Brazeau Abd Elhameed Ahmed Abdulla Salem Bin-Ghouth Arran Hamlet	2
+ PDF Chat	Using mortuary and burial data to place COVID-19 in Lusaka, Zambia within a global context	2023	Richard Sheppard Oliver J. Watson Rachel Pieciak James Lungu Geoffrey Kwenda Crispin Moyo Stephen Longa Chanda Gregory Barnsley Nicholas F. Brazeau Ines C. G. Gerard-Ursin	2
+ PDF Chat	Epidemiological drivers of transmissibility and severity of SARS-CoV-2 in England	2023	Pablo N. Perez‐Guzman Edward Knock Natsuko Imai Thomas Rawson C. Santoni Joana Alçada Lilith K. Whittles Divya Thekke Kanapram Raphael Sonabend Katy A. M. Gaythorpe	2
+ PDF Chat	Population-based assessment of the burden of COVID-19 infection in African countries: a first-year report card and public health implications	2023	Osaro Mgbere Ogbonna Collins Nwabuko Olajumoke A. Olateju Omolola E. Adepoju Winston Liaw Charles Darkoh Ekere James Essien	2
+ PDF Chat	From Easing Lockdowns to Scaling Up Community-based Coronavirus Disease 2019 Screening, Testing, and Contact Tracing in Africa—Shared Approaches, Innovations, and Challenges to Minimize Morbidity and Mortality	2020	Jean B. Nachega Ashraf Grimwood Hassan Mahomed Geoffrey Fatti Wolfgang Preiser Oscar Kallay Placide Mbala Jean-Jacques T. Muyembe Edson Rwagasore Sabin Nsanzimana	1
+	Randomization in Clinical Trials	2002	William F. Rosenberger John M. Lachin	1
+	Randomization in Clinical Trials: Theory and Practice	2002	William F. Rosenberger John M. Lachin	1
+	Susceptibility to SARS-CoV-2 Infection Among Children and Adolescents Compared With Adults	2020	Russell Viner Oliver Mytton Chris Bonell G. J. Meléndez‐Torres Joseph Ward Lee Hudson Claire S. Waddington James Thomas Simon Russell Fiona van der Klis	1
+ PDF Chat	Age-specific mortality and immunity patterns of SARS-CoV-2	2020	Megan O’Driscoll Gabriel Ribeiro dos Santos Lin Wang Derek A. T. Cummings Andrew S. Azman Juliette Paireau Arnaud Fontanet Simon Cauchemez Henrik Salje	1
+	Higher SARS-CoV-2 seroprevalence in workers with lower socioeconomic status in Cape Town, South Africa	2021	Jane Shaw Maynard Meiring Tracy Cummins Novel N. Chegou Conita Claassen Nelita du Plessis Marika Flinn Andriëtte Hiemstra Léanie Kleynhans Vinzeigh Leukes	1
+	In the moment of making History: The case of COVID-19 in Zambia	2020	Ackson M. Kanduza	1
+ PDF Chat	Covid-19 deaths in Africa: prospective systematic postmortem surveillance study	2021	Lawrence Mwananyanda Christopher Gill William MacLeod Geoffrey Kwenda Rachel Pieciak Zachariah Mupila Rotem Lapidot Francis Mupeta Leah S. Forman Luunga Ziko	1
+	Design and Analysis of Cluster Randomization Trials in Health Research	2000	Allan Donner Neil Klar	1
+	Serological evidence of human infection with SARS-CoV-2: a systematic review and meta-analysis	2021	Xinhua Chen Zhiyuan Chen Andrew S. Azman Xiaowei Deng Ruijia Sun Zeyao Zhao Nan Zheng Xinghui Chen Wanying Lu Tingyu Zhuang	1
+ PDF Chat	Prevalence of Severe Acute Respiratory Syndrome Coronavirus 2 Among Healthcare Workers—Zambia, July 2020	2021	Sombo Fwoloshi Jonas Z. Hines Danielle T. Barradas Samuel Yingst Mpanji Siwingwa Lameck Chirwa James Exnobert Zulu Dabwitso Banda Adam Wolkon Kotey I Nikoi	1
+ PDF Chat	Comparison of control and transmission of COVID-19 across epidemic waves in Hong Kong: an observational study	2023	Bingyi Yang Yun Lin Weijia Xiong Chang Liu Huizhi Gao Faith Ho Jiayi Zhou Ru Zhang Jessica Y. Wong Justin Cheung	1
+ PDF Chat	Global seroprevalence of SARS-CoV-2 antibodies: A systematic review and meta-analysis	2021	Niklas Bobrovitz Rahul K. Arora Christian Cao Emily Boucher Michael Liu Claire Donnici Mercedes Yanes‐Lane Mairead Whelan Sara Perlman‐Arrow Judy Chen	1
+ PDF Chat	Navigating the COVID-19 outbreak in Zambia	2022	Chikwe Mwansa Yusuff Adebayo Adebisi Knovicks Simfukwe Hope Ezra Mukwinda Don Eliseo Lucero‐Prisno	1
+ PDF Chat	Seroprevalence of anti‐SARS‐CoV‐2 antibodies in Africa: A systematic review and meta‐analysis	2021	Master Chisale Sheena Ramazanu Saul Eric Mwale Pizga Kumwenda Mep Chipeta Atipatsa Chiwanda Kaminga Obed Nkhata Billy Nyambalo Elton Chavura Balwani Chingatichifwe Mbakaya	1
+	SARS-CoV-2 seroprevalence and associated factors in Manaus, Brazil: baseline results from the DETECTCoV-19 cohort study	2021	Pritesh Lalwani Bárbara Batista Salgado Ivanildo Vieira Pereira Filho Danielle Severino Sena da Silva Thiago Barros do Nascimento de Morais Maele Ferreira Jordão Aguyda Rayany Cavalcante Barbosa Isabelle Bezerra Cordeiro Júlio Nino de Souza Neto Enedina Nogueira de Assunção	1
+	SARS-CoV-2 Prevalence among Outpatients during Community Transmission, Zambia, July 2020	2021	Jonas Z. Hines Sombo Fwoloshi Davies Kampamba Danielle T. Barradas Dabwitso Banda James Exnobert Zulu Adam Wolkon Samuel Yingst Mary Adetinuke Boyd Mpanji Siwingwa	1
+	COVID-19 mortality in women and men in sub-Saharan Africa: a cross-sectional study	2021	Jyoti Dalal Isotta Triulzi Ananthu James Benedict Nguimbis Gabriela Guizzo Dri Akarsh Venkatasubramanian Lucie Noubi Tchoupopnou Royd Sara Botero Mesa Peter Somerville Giuseppe Turchetti	1
+	Design and Analysis of Group-Randomized Trials	2007	David M. Murray	1
+ PDF Chat	What is the prevalence of COVID-19 detection by PCR among deceased individuals in Lusaka, Zambia? A postmortem surveillance study	2022	Christopher Gill Lawrence Mwananyanda William MacLeod Geoffrey Kwenda Rachel Pieciak Lauren Etter Daniel J. Bridges Chilufya Chikoti Sarah Chirwa Charles Chimoga	1
+ PDF Chat	Impact of vaccinations, boosters and lockdowns on COVID-19 waves in French Polynesia	2023	Lloyd A. C. Chapman Maïté Aubry Noémie Maset Timothy Russell Edward Knock John A. Lees Henri‐Pierre Mallet Van‐Mai Cao‐Lormeau Adam J. Kucharski	1
+ PDF Chat	Impact of vaccinations, boosters and lockdowns on COVID-19 waves in French Polynesia	2023	Lloyd A. C. Chapman Maïté Aubry Noémie Maset Timothy Russell Edward Knock John A. Lees Henri‐Pierre Mallet Van‐Mai Cao‐Lormeau Adam J. Kucharski	1
+ PDF Chat	A framework for reconstructing SARS-CoV-2 transmission dynamics using excess mortality data	2022	Mahan Ghafari Oliver J. Watson Ariel Karlinsky Luca Ferretti Aris Katzourakis	1
+ PDF Chat	Community-based COVID-19 active case finding and rapid response in the Democratic Republic of the Congo: Improving case detection and response	2023	John Otokoye Otshudiema Gervais Léon Tengomo Folefack Justus Nsio Cathy H. Kakema Luigino Minikulu Aimé Bafuana Joel B. Kosianza Antoine Mfumu Kihumba Edith Nkwembe Yannick Munyeku-Bazitama	1
+	Comparison of stratification and adaptive methods for treatment allocation in an acute stroke clinical trial by Christopher J. Weir and Kennedy R. Lees, <i>Statistics in Medine</i> 2003; <b>22</b>:705–726	2004	Damian McEntegart	1
+	Generation of allocation sequences in randomised trials: chance, not choice	2002	Kenneth F. Schulz David A. Grimes	1