As the world moves into the second year of the Covid-19 pandemic, SARS-CoV-2 variants are now the fundamental issue at the root of many of our questions—Will the vaccines work? Will we need new shots each year? Will the pandemic end or can we expect a renewed surge of Covid-19 cases every year, like we see with the flu?

Understanding virus variation is critical to understanding how the pandemic will unfold and how Covid-19 may continue to affect our global economy, our societies, and all of us individually. Will the current decline in new infections in the United States, for example, be permanent or a case of seasonal population immunity? These are the questions and issues at the heart of a new book by William A. Haseltine, PhD, Variants! The Shape-Shifting Challenge of COVID-19.

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Currently only electronic versions of the book are available.

© William A. Haseltine, PhD. All Rights Reserved.