The SARS-CoV-2 Transmission Riddle - Part 2

We need clarity in the evidentiary rules about how viruses spread

In late 2020, the World Health Organisation asked us to review and summarise the evidence of what was known on the transmission mode of SARs-CoV-2. How pathogens are transmitted from person to person - directly or indirectly - is central to managing this or any other epidemic.  

For example, only after discovering that cholera was a waterborne disease co…