https://www.selleckchem.com/products/lificiguat-yc-1.html 11) tobacco-related content on social media. Qualitative analysis resulted in emergent themes of smokers imitating tobacco-related photos or videos seen on social media and peers as an influence for smoking initiation. This study suggests social media and social interactions may influence smoking behaviour in university students in Dhaka, Bangladesh. Future research should continue to investigate the roles social media and social interaction have on smoking in order to explore social media-based smoking cessation interventions or dissemination of smoking health hazards through social media. This study suggests social media and social interactions may influence smoking behaviour in university students in Dhaka, Bangladesh. Future research should continue to investigate the roles social media and social interaction have on smoking in order to explore social media-based smoking cessation interventions or dissemination of smoking health hazards through social media.'Codesign' and associated terms such as 'coproduction' or 'patient engagement', are increasingly common in the health research literature, due to an increased emphasis on the importance of ensuring that research related to service/systems development is meaningful to end-users.  However, there continues to be a lack of clarity regarding the key principles and practices of codesign, and wide variation in the extent to which service users are meaningfully engaged in the process. These issues are particularly acute when end-users include populations who have significant health and healthcare disparities that are linked to a range of intersecting vulnerabilities (eg, poverty, language barriers, age, disability, minority status, stigmatised conditions).  The purpose of this paper is to prompt critical reflection on the nature of codesign research with vulnerable populations, including key issues to consider in the initial planning phases, the implementation