Money matters: The association between blood donation rates and healthcare system quality across 171 countries.

Higher healthcare system quality in terms of HAQ Index and higher healthcare expenditures are related to higher blood donation rates. The finding that healthcare expenditures are most consistently related to blood donation rates indicates that policymakers should consider prioritizing financial support for the healthcare system, including blood-collecting institutions. More broadly, a better understanding of the role of contextual factors for blood donation may be needed to increase blood availability worldwide.