[People in the U.S. have died from so-called superbug infections...

[People in the U.S. have died from so-called superbug infections before. The CDC estimates that 23,000 die every year from multidrug-resistant infections. A British report, The Review on Antimicrobial Resistance, estimates that globally, 700,000 people die each year from infections that are drug-resistant.Jan 17, 2017]
https://www.npr.org/sections/goatsandsoda/2017/01/17/510227493/a-superbug-that-resisted-26-antibiotics?t=1549395371025

OK the paper was on rats but if a drug exists that can do that with people then I would think it is an emergency to get it to market. We have already seen that PBT2 is safe right out to 2 years at the high dose 250mg.