The methods used in this article are utilization of publicly accessible data archives, peer reviewed articles and FOIA request from Center of Disease control and prevention (CDC), Food and Drug Administration (FDA), National Vital Statistics System (NVSS) and Office of Management and Budget (OMB) regarding memos, emails and all pertinent information discussing International Classification of Disease (ICD) code U07.1 changes. In addition, a review of recent definition changes is addressed. Future papers from the author will discuss many more examples of definition changes during the pandemic and their impact. Also, the FOIA requests seek copies (with Personal Health Information (PHI) redacted) of all death certificates that listed U07.1 as a cause of death. Due to increasing demand, complex FOIA are backlogged in processing for over a year. Several field specific experts, researchers and clinical scientists, have been interviewed for perspective. This is a Tycho Brahe approach to Pandemic data gathering, that is, to have all the data gathered and available when the time comes for it to be needed. The data presented have not been altered or changed by the author.