See? There's somebody who knows what they are talking about. Everybody knows about SSRNA genome. Multiple strains and rapid mutations are definitely confounding factors in trying to understand something. So just stop asking silly questions because somebody has already thought of an answer of why your questions are just silly.
...So just stop asking silly questions because somebody has already thought of an answer of why your questions are just silly.
The question is not silly if one does not understand,
students are to be taught, open minds are to be filled