I get your question, but admit I can not answer definitively.
I assume "Brilacidin reduced the viral load in the samples 97 and 99% more than nothing at all did." and assume the words in bold type are yours(and mean placebo. Don't know.
So, if two subjects started at the same time, one on B and one on placebo, their virus load concentrations measured at initiation, and again upon completion. If placebo virus load INCREASES 50% and B has lower numbers compared to placebo at the end by 97%, and both patients start at 100mg/dL(not sure of the units of measurement, really doesn't matter), then placebo ends up with 150mg/dL, while B ends 4.5mg/dL (150mg/dLX.03).
If placebo virus load INCREASES 75% and B has lower numbers compared to placebo at the end by 97%, and both patients start at 100mg/dL(not sure of the units of measurement, really doesn't matter), then placebo ends up with 175mg/dL, while B ends 5.25mg/dL (175mg/dLX.03).
If placebo virus load INCREASES 100%(suffocation i would think) and B has lower numbers compared to placebo at the end by 97%, and both patients start at 100mg/dL(not sure of the units of measurement, really doesn't matter), then placebo ends up with 200mg/dL, while B ends 6 mg/dL (200mg/dLX.03).
Hope my math is correct.