The book's claims have been widely challenged by public health experts and fact-checkers :
: He contends that a 10% increase in excess deaths is typically a once-in-200-year event; thus, a 40% jump represents an "earth-shaking" anomaly. Cause Unknown - Ed Dowd
: Some reports, such as those from the Associated Press, have identified individuals featured in the book whose deaths were attributed to non-vaccine causes (e.g., undiagnosed pre-existing conditions) despite being used as examples of "sudden death". The book's claims have been widely challenged by
Published in 2022 by Skyhorse Publishing in partnership with Children’s Health Defense, this book argues that there was an unprecedented and unexplained surge in excess mortality among young and working-age people starting in 2021. Edward Dowd, a former BlackRock portfolio manager, uses his background in financial pattern recognition to analyze actuarial and insurance data. Edward Dowd, a former BlackRock portfolio manager, uses
: Experts from the CDC and various medical journals attribute the 2021 excess deaths to the spread of highly contagious variants like Delta and Omicron , which caused significant mortality even in younger groups.
The following overview summarizes the core arguments and data presented in Cause Unknown: The Epidemic of Sudden Deaths in 2021 & 2022 by Edward Dowd, along with the critiques from the broader scientific and fact-checking communities.