“…To our knowledge, at least 12 studies have investigated factors associated with willingness to take up COVID-19 vaccination among older adults [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], while fewer studies have looked at factors influencing actual uptake in this group [ 10 , 22 ]. Facilitators identified by these studies included a history of seasonal influenza vaccination [ 18 , 19 , 20 ]; perceived higher risk and severer consequences of COVID-19 [ 10 , 11 , 12 , 14 , 17 , 19 , 20 ]; belief in vaccine efficacy and other benefits [ 10 , 13 , 14 , 15 , 17 ]; trust in vaccination information obtained from social media, friends, or family members [ 11 , 14 ]; higher social support [ 11 ]; and trust in the healthcare system, healthcare workers, or the government [ 11 , 14 ]. Barriers to receive COVID-19 vaccination found by these studies included ethnicity (Hispanic, Black, or African American) [ 9 , 16 ], lower education or income [ 9 , 19 , 20 ], aged over 70 years [ 13 , 19 ], and concerns about safety and side-effects of the vaccines [ 10 , 15 , 16 , 19 ,…”