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Zeta potentials of CoVaccine HT emulsion droplets in co-lyophilized adjuvanted formulations compared to zeta potentials for CoVaccine HT (CoV) emulsion droplets alone. All formulations were lyophilized and reconstituted unless otherwise noted as liquid (LIQ). Error bars are standard deviation from the average of three replicates. Instrument error was between 0.5 and 2.1 mV. Labels refer to groups defined in Table 1.
