After studying medicine at the Faculty of Medicine in Geneva and training in paediatrics at the Geneva University Hospitals (HUG), Dr Arnaud L'Huillier trained in paediatric infectious diseases at the Hospital for Sick Children in Toronto. He continued his studies in Canada at the University Health Network, where he specialised in virology and transplant infectiology. Thanks to his research work in this field, he received the Future Leader Career Development Award from the International Paediatric Transplant Association (IPTA). 

In 2019, Dr Arnaud L'Huillier returns to the HUG and obtains his privat-docent in 2021. He becomes head of HUG’s pediatric infectious diseases unit in 2022 and director of the Department of Pediatrics, Gynecology and Obstetrics’ clinical research platform in 2024 

During the COVID-19 pandemic, he was appointed to represent Swiss Paediatrics on the Swiss National COVID-19 Science Task Force. 

Dr Arnaud L'Huillier is involved in a number of national and international societies 

• Chairman of the IPTA Infectious Diseases Group 

• Member of three working groups within the Swiss Transplant Cohort Study (STCS) 

• Paediatrics, Infectious Diseases, Lymphoma/Cancer) 

• Chairman of the IPTA Infectious Diseases Group 

• Member of three working groups within the Swiss Transplant Cohort Study (STCS 

• Paediatrics, Infectious Diseases, Lymphoma/Cancer) 

• Member of the IPTA Nominations Committee 

• Member of the International Expert Group on Post-Transplant Lymphoproliferative 

• transplantation 

• Member of two working groups within the American Society of Transplantation 

• (Paediatrics, Infectious Diseases) 

• Member of the Swiss Infectious Diseases Society and the Swiss Group of Infectious Diseases 
  paediatricians 

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