The IgG Antibody Test is only validated by Public Health England for venous puncture samples, and not capillary-based samples. Our government approved laboratory has self-validated capillary samples for home sample collection kits. Venous sampling involves using a catheter to take a blood sample directly from the vein. The sample is most commonly taken from the inner crook of the elbow, between the upper and lower arm. Capillary sampling involves collecting a blood sample from a puncture, typically in the tip of the finger, on the heel or the earlobe. The blood sample will be collected from smaller blood vessels near the skin’s surface.