COVID-19 mortality and vaccine efficacy in nursing homes: does vitamin B12 deficiency play a role?

Henry Olders, P.Eng, MD, FRCPC Affiliate Member, Dept of Psychiatry, McGill University, Montreal, Canada henry.olders@mcgill.ca Abstract It is believed that nursing home residents experience more disease severity and higher mortality from COVID-19, compared to community-dwelling elderly with similar comorbidities. Among the possible explanations for this phenomenon is the difference in…

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What causes insomnia?

This article was published on the website of Scientific American, on 2003-5-12. download a pdf file of the web article. An edited version appeared in the print edition of Scientific American, October 2003. Download a pdf file of the print article. The articles were republished in 2006 in the print and online…

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