This effort is destined to fail! Why, because 99 % of researchers don't even know what causes ALZ. ALL clinical trials that have targeted Amyloid beta have failed. There's something that causes the A-b to clump. Remove it and you will correct the problem.
An upcoming clinical study is going to hopefully succeed. It will use something called GBF that will be allowed to pass the blood brain barrier, correct the oxidative stress & remove the mysterious element that causes the clumps.