Strange that they call it a vaccine.
Nomenclature aside, it's even better to not develop the inflammation in the first place.
And it can be done with a simple (but difficult) change: stop eating insane amounts of sugar and carbs that most people eat in standard American / western diet.
This prevents diabetes (because diabetes is "too much glucose in your blood" disease and not eating sugar (glucose) and carbs (are converted to glucose by our body).
Elevated levels of glucose trigger elevated levels of insulin. If it persists for long periods of time, it causes inflammation in our body, including brain.
This inflammation caused by diabetes is believed to be main cause of Alzheimer. Some scientists even call Alzheimer a Type 3 diabetes.
As to "insane amounts of sugar": you probably consume insane amount of sugar without knowing your doing it.
The optimal amount of glucose in our blood in 3 grams, which is 6 grams of sugar.
A daily recommended dose of sugar is 25 grams for women and 36 for men.
A single can of coca-cola is 33 grams of sugar. That's more than a daily sugar budget for a woman and almost daily budget for a man.
An average consumption by an American is 76.7 grams i.e. 2x daily recommended dose.