This document had all the answers and WHO failed to follow their own guidance. It is rather shocking and this built upon the seminal 2006 work by Dr. Donald Henderson, who eradicated smallpox.
First, it’s the vaccine, stupid, it’s NOT the virus, that is causing the infectious variants! It’s the vaccine!
World Health Organization (WHO):
Source 1 and below
Non-pharmaceutical public health measures for mitigating the risk and impact of epidemic and pandemic influenza PDF9789241516839-eng
Dr. Donald Henderson:
Source 2 and below