They know the reasons. Ivernection, HCQ etc... If these people are already taking HCQ for malaria prevention they are ahead of the game.
These scientist know the reasons but they will not and cannot tell the reasons because their other scientist/doctors are too busy making $ from these failed vaccines in the 1st/2nd world countries.
And these people are not real scientist who are mystified, they are cowards who run from the truth like dracula from a cross.
No, they are not taking HCQ to prevent malaria. Google “chloroquine resistant malaria map”. You will see it includes nearly all of subs what an Africa, meaning HCQ is useless. Ivermectin is not used as prophylaxis, either, not even for worms. It is used to treat roundworm, etc.