Possibly all year, in fact. From the Independent...
Efforts to discredit claims that Alzheimer's is infectious is similar to how the mad cow disease scandal was handled
The suggestion that Alzheimer’s may be a transmissible disease, and the reluctance of government science advisers to countenance the idea, has parallels with what happened over “mad cow” disease in the late 1980s and early 1990s.
At the time, science advisers to the government took the cautious approach that there was “no evidence” mad cow disease was a threat to human health, although they privately admitted that did not mean there was “no risk”.
The “no evidence” line is similar to that adopted by the Department of Health in relation to the possible transmission of Alzheimer’s disease.
Ooh, uncanny! What a spooky coincidence. Makes you think, huh?
The whole article is here, but its entire 'argument' is presented above. There really is nothing more to it than claming that if there is no evidence for something, there are "parallels" with the mad cow disease situation twenty years ago.
There are also parallels with millions of instances when there was no evidence because there was no relationship, but that doesn't seem to have occurred to the author.
Words almost fail me. I've seen comments on the David Icke forum that have more intellectual weight than this.