BMJ – SkepDoc

Does Vitamin D Prevent Autoimmune Disease?

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 of vitamin D supplements abound,

Statistical Shenanigans?

Aug 5, 2022Harriet A. Hall, MDBasic science, COVID-19, Science-based Medicine Blog, VaccinesAESI, Animals, BMJ, Brighton Collaboration, Peter Doshi, SPEAC, WHO

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 This pre-print of an as-yet unpublished re-analysis raises many questions but doesn’t support the claims being made on antivaccine sites.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 he said has been appearing