Fig. 1From: Incidence of anti-platelet factor4/polyanionic antibodies, thrombocytopenia, and thrombosis after COVID-19 vaccination with ChAdOx1 nCoV-19 in ThaisOptical density of 3 samples with negative anti-PF4/polyanionic antibodies at baseline and conversion to positive at various time points. One participant developed seroconversion at day 0 of the second dose (Triangle). Two participants had seroconversion at day 10 after the second (square) and the booster dose (circle), respectively. Grey shading indicates negative resultBack to article page