Epidemiologists often use the Epidemiologic Triangle as a conceptual framework for understanding epidemics/pandemics of acute, infectious disease. The article in the Reading Assignment for Week 12 by Meyerowitz, Richterman, Gandhi and Sax, entitled Transmission of SARS-CoV-2: A Review of Viral, Host, and Environmental Factors, published in the Annals of Internal Medicine, exemplifies this approach. Please discuss in 200 words our current understanding, as outlined in this article, of the viral, host and environmental factors in the Covid-19 Pandemic. Put otherwise, based on this article, what do we now know about the role viral, host and environmental factors play in causing the Covid-19 pandemic, i.e., in facilitating the spread of this disease?
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