​Updates on the Science Behind PrEP
Dr Wong Chen Seong
Deputy Director, National HIV Programme, NCID 

Dr Wong Chen Seong is a Senior Consultant Infectious Diseases Physician at the National Centre for Infectious Diseases (NCID) and Tan Tock Seng Hospital (TTSH), Deputy Director of the National HIV Programme, and Director of the NCID HIV Clinical Programme. He is actively involved in HIV clinical care and research, with interests in the socio-behavioural determinants of HIV/STI, HIV/STI prevention, HIV Pre-Exposure Prophylaxis (PrEP), innovations in HIV service delivery such as telemedicine, as well as HIV and ageing and co-morbidity.

Dr Wong is also actively involved in both undergraduate and post-graduate medical education and training, and is a Clinical Lecturer at Yong Loo Lin School of Medicine and Lee Kong Chian School of Medicine, as well as an Associate Programme Director of the National Healthcare Group Internal Medicine Residency Programme.

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Counselling and Referring to PrEP Services
Leow Yangfa
Executive Director, Oogachaga

Leow Yangfa is executive director of Oogachaga, Singapore’s most established, community-based, non-profit professional organisation working with lesbian, gay, bisexual, transgender, questioning, queer and gender-diverse (LGBTQ+) individuals, couples and families.

As a registered social worker, Yangfa has professional experience working in Singapore’s non-profit sector, in social service planning, development and evaluation (in National Council of Social Service from 1999 to 2005), suicide prevention, intervention and training (in Samaritans of Singapore from 2005 to 2013), and working with the LGBTQ+ community (in Oogachaga since 2013).  His current role includes providing professional counselling for clients, volunteer management, community and corporate engagement, fund-raising, publicity and delivering professional workshops. 

He is a registered member of Singapore’s Social Work Accreditation and Advisory Board (SWAAB), with a Graduate Diploma in Social Work (National University of Singapore) and Bachelor’s Degree in Social Policy (Royal Holloway, University of London). He is also a member of Singapore Association of Social Workers (SASW) and life member of Action for AIDS (AfA).

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Arun Kumar
Clinical HIV Programme Manager, NCID

Arun is currently the Programme Manager with the Clinical HIV Programme at National Centre for Infectious Diseases (NCID), and has previously worked with the National HIV Programme. He is former nurse with 11 years’ experience in HIV and sexual health community engagement and programme management. He has collaborated on theoretically-informed and community-engaged HIV social research with culturally and linguistically diverse people living with HIV at the national level.

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Chronos Kwok
Senior Manager, Action for AIDS

Chronos is the Senior Manager of the MSM Programme at Action for AIDS (AfA), Singapore. Since making his switch from civil service to the social services sector, he strongly believes that more can be done to support marginalised groups in Singapore, so as to build an inclusive and compassionate society. Prior to his current role, Chronos was an active volunteer with AfA since 2005. He has a Master’s Degree in Social Work from the Singapore University of Social Sciences. 

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Daniel Le

HIV Programme Manager, National University Hospital

Daniel is a HIV Programme Manager at National University Hospital. He oversees the vital programmes within the HIV care cascade, ensuring a continuity from prevention to living well with HIV. His passion and interest in HIV stems from his early year journey of self-discovery in the gay community and witnessing first-hand how HIV/AIDS robbed his friends of a full life. Daniel continues on this movement so that one day, we can say “Yes, we ended HIV together!”

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National PrEP Guidance – NHIVP Updates
Dr Choy Chiaw Yee
Consultant, National HIV Programme, NCID

Dr Choy Chiaw Yee is a Consultant Infectious Diseases Physician at the National Centre for Infectious Diseases (NCID) and Tan Tock Seng Hospital. She received her medical training at the Yong Loo Lin School of Medicine and gained membership to the Royal College of Physicians of the United Kingdom in 2016. Having an active interest in HIV clinical care and research, she is a member of the National HIV Programme and Deputy Director of NCID Clinical HIV Programme. She is also actively involved in education and is a Lee Kong Chian Medicine adjunct teaching faculty and NUS medical faculty member.

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Sexual Health
Dr Tay Woo Chiao
Senior Resident, DSC Clinic

Dr Tay Woo Chiao is a Senior Resident at National Skin Centre and Department of STI Control (DSC) Clinic, and has a medical training from the Yong Loo Lin School of Medicine, National University of Singapore. He was conferred Membership to the Royal College of Physicians of the United Kingdom in 2021. Dr Tay is actively involved in STI clinical care and research, and has recently contributed the update of DSC’s STI Management Guidelines. He has a strong passion for the teaching and training of medical professionals, and has received the Internal Medicine Peer Teacher Award, as well as the National Healthcare Group Teaching Award in 2022. Dr Tay also has a firm conviction in the importance of promoting sexual health and actively volunteers at AFA to educate volunteers on sexual health 101. 

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​Monitoring and Evaluation of PrEP Services
A/Prof Sophia Archuleta
Director, National HIV Programme, NCID

A/Prof Sophia Archuleta is Director of the National HIV Programme, National Centre for Infectious Diseases (NCID), and Head of the Division of Infectious Diseases at the National University Hospital, Singapore. She is also a clinician educator and serves as core faculty of the National University Health System Infectious Diseases Senior Residency Programme. Her clinical expertise, and primary interest, is in the care of people living with HIV and its associated conditions.

A/Prof Archuleta joined the Division of Infectious Diseases of the National University Hospital in Singapore in 2008 where she established and led the HIV Programme until 2017. She was appointed Director of the National HIV Programme, National Centre for Infectious Diseases in 2018. She is an Associate Professor of Medicine at the Yong Loo Lin School of Medicine of the National University of Singapore, and serves in various educational leadership roles and national committees on graduate medical education. She is active in teaching learners across health professions and the entire medical education continuum.

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Challenging Situations when Prescribing PrEP
Dr Dariusz Olszyna
Senior Consultant, National University Hospital

Dr Olszyna received a medical degree from the University of Amsterdam in the Netherlands. He completed his advanced medical specialty training in internal medicine and infectious diseases at the Academic Medical Center in Amsterdam. In 2001, he was awarded a PhD in medicine from the University of Amsterdam.

Dr Olszyna has been working in the field of HIV for more than 15 years, providing care for people living with HIV/AIDS as well as training in this field for healthcare workers and students. His other clinical interests are Pre-Exposure Prophylaxis (PrEP), treatment as prevention as well as viral hepatitis co-infections.

Dr Olszyna joined the Division of Infectious Diseases at the National University Hospital, Singapore in 2008. He is one of the co-founders and current Clinical Director of the NUH HIV Program, founder of the NUH PrEP service and the sexual health clinic (NUH BePrEP Clinic). Dr Olszyna also serves as the Head of the Division of Advanced Internal Medicine at NUH and Vice Chairman of Medical Board for Education in Alexandra Hospital.

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GP Perspectives on PrEP Implementation
Dr Jonathan Ti
Chief Medical Officer, Dr Tan & Partners Clinic

Dr Jonathan Ti graduated from the Royal College of Surgeons in Ireland in 2011 before moving to Singapore to further his medical training. He completed his postgraduate qualifications for Membership to the Royal College of Physicians (UK) in 2015 and obtained his certificate in Men's Health and Andrology in 2017.

Dr. Ti underwent training for several years with the Internal Medicine Residency Program in tertiary and community hospitals across the country. He was exposed to a wide range of subspecialty postings, including Endocrinology, Renal Medicine, Infectious Diseases, Gastroenterology, Cardiology and Emergency Medicine among many others which have given him invaluable experience.

His special interests are in Men's Health and Sexual Health, as well as Endocrine and Metabolic / Weight Loss disease management. He has taken on a role in developing guidelines for the Blueprint to End HIV in Singapore (Community Subsector), and has presented clinical research at several international conferences, focusing his efforts now on strengthening primary healthcare in Singapore.