There is no question that mefloquine use causes long-term, psychiatric and neurologic symptoms.
Now, there is a question of what percentage of individuals who took mefloquine correctly—meaning, they discontinued the drug at the first onset of any neurologic or psychiatric symptom—are disabled to some degree? How many have a psychiatric or neurologic diagnosis of some kind that we can attribute to mefloquine as a result of that correct use? Those are questions that can be asked and answered.
We should also ask the question of individuals who did not use mefloquine correctly, such as service members who were ordered to continue taking mefloquine even after they developed horrific nightmares, anxiety and depression. What percentage of those individuals are disabled to some degree as a result of those continued, persistent symptoms?
These are questions we can ask.