Vasovagal reaction among whole blood donors in Hospital Pulau Pinang. A statistical-epidemiological study.

Context: Whole blood donation is generally considered a safe procedure; however, a small percentage of donors could develop vasovagal reactions (VVRs) during or after completion of blood donation.

Aims: This study was undertaken to establish the prevalence of VVR among whole blood donors in Hospital Pulau Pinang and to investigate factors that lead to its occurrence.

Settings And Design: A cross-sectional study was conducted involving 27,890 whole blood donations in 2016.