Lander Willem





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Personal Academic Website

Research/Topics of Interest

Pathogens/Diseases of Main Interest/Expertise

Countries of Work/Collaboration



Franco N, Coletti P, Willem L, Angeli L, Lajot A, Abrams S, Beutels P, Faes C, Hens N. (2022). Inferring age-specific differences in susceptibility to and infectiousness upon SARS-CoV-2 infection based on Belgian social contact data. PLoS computational biology, 18(3)

Wambua J, Hermans L, Coletti P, Verelst F, Willem L, Jarvis CI, Gimma A, Wong KLM, Lajot A, Demarest S, Edmunds WJ, Faes C, Beutels P, Hens N. (2022). The influence of risk perceptions on close contact frequency during the SARS-CoV-2 pandemic. Scientific reports, 12(1)

Kuylen EJ, Torneri A, Willem L, Libin PJK, Abrams S, Coletti P, Franco N, Verelst F, Beutels P, Liesenborgs J, Hens N. (2022). Different forms of superspreading lead to different outcomes: Heterogeneity in infectiousness and contact behavior relevant for the case of SARS-CoV-2. PLoS computational biology, 18(8)

Li X, Bilcke J, Vázquez Fernández L, Bont L, Willem L, Wisløff T, Jit M, Beutels P, . (2022). Cost-effectiveness of Respiratory Syncytial Virus Disease Prevention Strategies: Maternal Vaccine Versus Seasonal or Year-Round Monoclonal Antibody Program in Norwegian Children. The Journal of infectious diseases

Torneri A, Willem L, Colizza V, Kremer C, Meuris C, Darcis G, Hens N, Libin PJK. (2022). Controlling SARS-CoV-2 in schools using repetitive testing strategies. eLife, (11)

Molenberghs G, Faes C, Verbeeck J, Deboosere P, Abrams S, Willem L, Aerts J, Theeten H, Devleesschauwer B, Bustos Sierra N, Renard F, Herzog S, Lusyne P, Van der Heyden J, Van Oyen H, Van Damme P, Hens N. (2022). COVID-19 mortality, excess mortality, deaths per million and infection fatality ratio, Belgium, 9 March 2020 to 28 June 2020. Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 27(7)

Coletti P, Libin P, Petrof O, Willem L, Abrams S, Herzog SA, Faes C, Kuylen E, Wambua J, Beutels P, Hens N. (2021). A data-driven metapopulation model for the Belgian COVID-19 epidemic: assessing the impact of lockdown and exit strategies. BMC infectious diseases, 21(1)

Verelst F, Hermans L, Vercruysse S, Gimma A, Coletti P, Backer JA, Wong KLM, Wambua J, van Zandvoort K, Willem L, Bogaardt L, Faes C, Jarvis CI, Wallinga J, Edmunds WJ, Beutels P, Hens N. (2021). SOCRATES-CoMix: a platform for timely and open-source contact mixing data during and in between COVID-19 surges and interventions in over 20 European countries. BMC medicine, 19(1)

Abrams S, Wambua J, Santermans E, Willem L, Kuylen E, Coletti P, Libin P, Faes C, Petrof O, Herzog SA, Beutels P, Hens N. (2021). Modelling the early phase of the Belgian COVID-19 epidemic using a stochastic compartmental model and studying its implied future trajectories. Epidemics, (35)

Verelst F, Beutels P, Hens N, Willem L. (2021). Workplace influenza vaccination to reduce employee absenteeism: An economic analysis from the employers' perspective. Vaccine

Hoang TV, Coletti P, Kifle YW, Kerckhove KV, Vercruysse S, Willem L, Beutels P, Hens N. (2021). Close contact infection dynamics over time: insights from a second large-scale social contact survey in Flanders, Belgium, in 2010-2011. BMC infectious diseases, 21(1)

Verelst F, Kessels R, Willem L, Beutels P. (2021). No Such Thing as a Free-Rider? Understanding Drivers of Childhood and Adult Vaccination through a Multicountry Discrete Choice Experiment. Vaccines, 9(3)

Willem L, Abrams S, Libin PJK, Coletti P, Kuylen E, Petrof O, Møgelmose S, Wambua J, Herzog SA, Faes C, Beutels P, Hens N. (2021). The impact of contact tracing and household bubbles on deconfinement strategies for COVID-19. Nature communications, 12(1)

Annemans L, Beutels P, Bloom DE, De Backer W, Ethgen O, Luyten J, Van Wilder P, Willem L, Simoens S. (2021). Economic Evaluation of Vaccines: Belgian Reflections on the Need for a Broader Perspective. Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research, 24(1)

Libin PJK, Willem L, Verstraeten T, Torneri A, Vanderlocht J, Hens N. (2021). Assessing the feasibility and effectiveness of household-pooled universal testing to control COVID-19 epidemics. PLoS computational biology, 17(3)

Baral R, Li X, Willem L, Antillon M, Vilajeliu A, Jit M, Beutels P, Pecenka C. (2020). The impact of maternal RSV vaccine to protect infants in Gavi-supported countries: Estimates from two models. Vaccine

Willem L, Van Hoang T, Funk S, Coletti P, Beutels P, Hens N. (2020). SOCRATES: an online tool leveraging a social contact data sharing initiative to assess mitigation strategies for COVID-19. BMC research notes, 13(1)

Coletti P, Wambua J, Gimma A, Willem L, Vercruysse S, Vanhoutte B, Jarvis CI, Van Zandvoort K, Edmunds J, Beutels P, Hens N. (2020). CoMix: comparing mixing patterns in the Belgian population during and after lockdown. Scientific reports, 10(1)

Kuylen E, Willem L, Broeckhove J, Beutels P, Hens N. (2020). Clustering of susceptible individuals within households can drive measles outbreaks: an individual-based model exploration. Scientific reports, 10(1)

Li X, Willem L, Antillon M, Bilcke J, Jit M, Beutels P. (2020). Health and economic burden of respiratory syncytial virus (RSV) disease and the cost-effectiveness of potential interventions against RSV among children under 5 years in 72 Gavi-eligible countries. BMC medicine, 18(1)

Willem Lander, Hoang Thang Va, Funk Sebastian, Coletti Pietro, Beutels Philippe, Hens Niel. (2020). SOCRATES: An online tool leveraging a social contact data sharing initiative to assess mitigation strategies for COVID-19. Cold Spring Harbor Laboratory Press

Hoogink J, Verelst F, Kessels R, van Hoek AJ, Timen A, Willem L, Beutels P, Wallinga J, de Wit GA. (2020). Preferential differences in vaccination decision-making for oneself or one's child in The Netherlands: a discrete choice experiment. BMC public health, 20(1)

Niewiadomska AM, Jayabalasingham B, Seidman JC, Willem L, Grenfell B, Spiro D, Viboud C. (2019). Population-level mathematical modeling of antimicrobial resistance: a systematic review. BMC medicine, 17(1)

Verelst F, Kessels R, Delva W, Beutels P, Willem L. (2019). Drivers of vaccine decision-making in South Africa: A discrete choice experiment. Vaccine, 37(15)

Goeyvaerts N, Santermans E, Potter G, Torneri A, Van Kerckhove K, Willem L, Aerts M, Beutels P, Hens N. (2018). Household members do not contact each other at random: implications for infectious disease modelling. Proceedings. Biological sciences, 285(1893)

Verelst F, Willem L, Kessels R, Beutels P. (2018). Individual decisions to vaccinate one's child or oneself: A discrete choice experiment rejecting free-riding motives. Social science & medicine (1982), (207)

Willem L, Blommaert A, Hanquet G, Thiry N, Bilcke J, Theeten H, Verhaegen J, Goossens H, Beutels P. (2018). Economic evaluation of pneumococcal vaccines for adults aged over 50 years in Belgium. Human vaccines & immunotherapeutics, 14(5)

Verelst F, Willem L, Kessels R, Beutels P. (2018). Corrigendum to 'Individual decisions to vaccinate one's child or oneself: A discrete choice experiment rejecting free-riding motives' Soc. Sci. Med. 207 (2018) 106-116. Social science & medicine (1982), (217)

Willem L, Verelst F, Bilcke J, Hens N, Beutels P. (2017). Lessons from a decade of individual-based models for infectious disease transmission: a systematic review (2006-2015). BMC infectious diseases, 17(1)

Cador C, Andraud M, Willem L, Rose N. (2017). Control of endemic swine flu persistence in farrow-to-finish pig farms: a stochastic metapopulation modeling assessment. Veterinary research, 48(1)

Cador C, Rose N, Willem L, Andraud M. (2016). Maternally Derived Immunity Extends Swine Influenza A Virus Persistence within Farrow-to-Finish Pig Farms: Insights from a Stochastic Event-Driven Metapopulation Model. PloS one, 11(9)

Blommaert A, Bilcke J, Willem L, Verhaegen J, Goossens H, Beutels P. (2016). The cost-effectiveness of pneumococcal vaccination in healthy adults over 50: An exploration of influential factors for Belgium. Vaccine, 34(18)

Kifle YW, Goeyvaerts N, Van Kerckhove K, Willem L, Kucharski A, Faes C, Leirs H, Hens N, Beutels P. (2016). Correction: Animal Ownership and Touching Enrich the Context of Social Contacts Relevant to the Spread of Human Infectious Diseases. PloS one, 11(2)

Verelst F, Willem L, Beutels P. (2016). Behavioural Change Models for Infectious Disease Transmission: A Systematic Review (2010-2015). Journal of the Royal Society, Interface, 13(125)

Bilcke J, Chapman R, Atchison C, Cromer D, Johnson H, Willem L, Cox M, Edmunds WJ, Jit M. (2015). Quantifying Parameter and Structural Uncertainty of Dynamic Disease Transmission Models Using MCMC: An Application to Rotavirus Vaccination in England and Wales. Medical decision making : an international journal of the Society for Medical Decision Making, 35(5)

Kifle YW, Goeyvaerts N, Van Kerckhove K, Willem L, Kucharski A, Faes C, Leirs H, Hens N, Beutels P. (2015). Animal Ownership and Touching Enrich the Context of Social Contacts Relevant to the Spread of Human Infectious Diseases. PloS one, 10(7)

Ogunjimi B, Willem L, Beutels P, Hens N. (2015). Integrating between-host transmission and within-host immunity to analyze the impact of varicella vaccination on zoster. eLife, (4)

Willem L, Stijven S, Tijskens E, Beutels P, Hens N, Broeckhove J. (2015). Optimizing agent-based transmission models for infectious diseases. BMC bioinformatics, (16)

Goeyvaerts N, Willem L, Van Kerckhove K, Vandendijck Y, Hanquet G, Beutels P, Hens N. (2015). Estimating dynamic transmission model parameters for seasonal influenza by fitting to age and season-specific influenza-like illness incidence. Epidemics, (13)

Ogunjimi B, Buntinx F, Bartholomeeusen S, Terpstra I, De Haes I, Willem L, Elli S, Bilcke J, Van Damme P, Coenen S, Beutels P. (2015). Herpes zoster is associated with herpes simplex and other infections in under 60 year-olds. The Journal of infection, 70(2)

Willem L, Stijven S, Vladislavleva E, Broeckhove J, Beutels P, Hens N. (2014). Active learning to understand infectious disease models and improve policy making. PLoS computational biology, 10(4)

Willem L, Van Kerckhove K, Chao DL, Hens N, Beutels P. (2012). A nice day for an infection? Weather conditions and social contact patterns relevant to influenza transmission. PloS one, 7(11)

Bilcke J, Marais C, Ogunjimi B, Willem L, Hens N, Beutels P. (2012). Cost-effectiveness of vaccination against herpes zoster in adults aged over 60 years in Belgium. Vaccine, 30(3)

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