One study [31] reported risk factors for RSV infection and these included being a female, odds ratio (OR): 4.98 (95% confidence interval [CI]: 1.62–15.33); chronic heart failure, OR: 2.31 (1.13–4.73), and diabetes requiring insulin, OR: 9.82 (2.20–43.90). Here, INS is linked to congestive heart failure.