A new study published in The BMJ suggests vitamin D might prevent autoimmune disease, but there are reasons to be cautious. Up to 75% of American teens and adults are said to be deficient in vitamin D, but there is no agreement on what level constitutes deficiency. Claims for the health benefits… read more "Does Vitamin D Prevent Autoimmune Disease?"
The manufacturers of Covid-19 vaccines say they are 95% effective. Peter Doshi re-examined the evidence and estimates they are only 19-29% effective. This pre-print of an as-yet unpublished re-analysis raises many questions but doesn’t support the claims being made on antivaccine sites. A correspondent asked for my opinion about a study that… read more "Statistical Shenanigans?"