Nov 15, 2021 · The majority of prefusion S was from formaldehyde-fixed samples ( 12 ), while a great portion of postfusion S appeared to be from the BPL-inactivated sample, with a ratio of up to 66 to 81.3% ( 16, 18 ).In our sample, we further investigated the ratio of prefusion to postfusion Ss.. tridge perfusionprefusion