> If you believe in meta-analysis, which you should, I view meta-analysis as being like those mortgage-backed securities which crashed the world back in 2008.

> If you believe in meta-analysis, which you should, I view meta-analysis as being like those mortgage-backed securities which crashed the world back in 2008. I mean, yeah, theoretically, a bond whose yield is a weighted average of mortgages should be less risky than any one of the mortgages in it. But....the devil is in the details. When I start seeing meta-analysis which claim that, e.g., masks don't protect you from a respiratory illness which spreads by coughing and sneezing, or that vaccines are at best worthless and at worse cause autism, wellll..... ....I have to conclude that garbage-in, garbage-out.