Introduction
deaths
For decades, HIV/AIDS has been regarded as one of the most serious public health crises in history. To date, HIV/AIDS has affected a total of 37.7 million individuals and caused 36.3 million deaths worldwide [Recent advances in eHealth and mobile health (mHealth) technologies have transformed health care approaches, especially in the delivery of HIV/AIDS treatments. Lindayani et al [Our study was developed on the Health Belief Model [Although several eHealth interventions have been implemented to improve HIV treatment adherence and outcomes, there is a lack of studies performed in the settings of HIV epidemics in transition. For example, countries with large drug use populations, rapid changes in modes of transmission, and increasing coverage of smartphone use require specific and contextualized evidence and policies. In Vietnam, it is estimated that 250,000 individuals, including both adults and children, are living with HIV, 169,000 of whom are receiving ART [