For Yvonne Zhou - Specialist Pharmacist, Singapore General Hospital, global health began with a heart for Cambodia and a passion for responsible medicine. What started as supporting an antimicrobial stewardship programme from scratch evolved into a profound lesson in resilience, partnership, and watching local healthcare teams transform into national leaders.

 


When Yvonne first travelled to Cambodia on medical mission trips with friends from her church, she was struck by two things: the immense healthcare challenges the community faced, and the incredible resilience of its people.


 

 

 

Yvonne and her church friends at a medical mission at Project Khmer Hope Centre, Trang Village Cambodia

 

 

 


Those early visits sparked a lasting connection. So when the opportunity arose in 2017 to help establish an Antimicrobial Stewardship Programme (ASP) at Calmette Hospital in Phnom Penh, Yvonne gladly stepped forward. It united her professional calling in pharmacy with a deep personal desire to give back.

“I feel privileged to work in Singapore General Hospital, where we have access to advanced care, established systems, and strong resources. This motivated me to share our experience with partners in Cambodia, where stewardship was still in its early stages.”

Starting an antimicrobial stewardship programme from the ground up, however, was about much more than sharing protocols or guidelines. Between 2017 and 2019, Yvonne made annual visits to Phnom Penh to work side-by-side with local doctors, microbiologists, and pharmacists. Together, they mapped out local prescribing practices, identified gaps, and introduced practical strategies like prospective audit and feedback, point prevalence surveys, and antibiotic surveillance.

 

 

 

Lunch with Cambodian Antimicrobial Stewardship Teams and collaborators from NUS Saw Swee Hock School of Public Health at Calmette Hospital, Phnom Penh, Cambodia, 2019

Singapore and Cambodian Antimicrobial Stewardship Teams at Singapore General Hospital, 2019


 

 

 



Yet, the biggest hurdles weren’t technical; they were cultural and systemic.

In Cambodia, pharmacy had traditionally been a supply-focused role. Clinical decision-making around antibiotics was widely viewed as strictly a doctor’s domain, and language barriers added another layer of complexity, with medical notes written in French.

“Capacity building had to go beyond knowledge transfer. It involved building confidence, changing mindsets, and helping pharmacists see the true value of their clinical role.”

Rather than imposing Singapore’s methods, Yvonne and the team took a humble, collaborative approach. They listened, learned the local context, and worked alongside local champions to engage hospital leadership and build stewardship practices step by step. When COVID-19 halted international travel, the partnership adapted seamlessly to monthly virtual teaching sessions and online training.

Over the years, that patient groundwork yielded a quiet, extraordinary transformation. By 2024, when Yvonne attended a national ASP conference in Siem Reap, Calmette Hospital had established itself as a pioneer in antimicrobial stewardship for Cambodia. The healthcare teams she had once mentored were now standing on stage; leading lectures, sharing best practices, and training healthcare staff from across the country.

 

 

 

 

 

 

Attending an ASP Conference in 2024

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Back in 2017, I saw myself primarily as a teacher and mentor. Seeing them become teachers themselves, recognised as local experts role-modelling good stewardship, was one of the most fulfilling outcomes of this journey.

Yvonne Zhou
Specialist Pharmacist, Singapore General Hospital
 

Working in Cambodia also fundamentally reshaped how Yvonne approaches her daily practice back home in Singapore. It taught her the power of empathy, stakeholder engagement, and never taking existing systems for granted.

“Seeing what the team achieved despite limited resources reminded me to stay resourceful, persevere through challenges, and appreciate the strong support systems we have.”

For pharmacists and healthcare professionals curious about global health but hesitant to take the first step, Yvonne’s advice is clear and encouraging:

“Be brave and courageous! Approach the work with humility and view it as a partnership, not a one-way transfer of expertise. You do not need to know everything before you begin—more importantly, you must be willing to listen, understand, contribute respectfully, and learn alongside others.”

 


Read the full series of Global Health Champion here.

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