If a paper is published which claims that such-and-such drug shows effectiveness against shingles, it's easy and trivial to say, "Not so fast my friend" followed by any number of statements about Big Pharma, citing previous situations in which a claim was later shown to be false, etc. But while all of those things may, in fact, be true, they don't bring to bear any actual evidence that this particular drug study is flawed and exactly how.