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[–]Tom_Bombadil 3 insightful - 2 fun3 insightful - 1 fun4 insightful - 2 fun -  (1 child)

But the truth is still that each year a new coronavirus does the rounds all over the planet in an undeclared "pandemic" called the common cold.

How do we know it's "new", or different in any way?

How do we know it travels infectiously?

[–][deleted] 2 insightful - 2 fun2 insightful - 1 fun3 insightful - 2 fun -  (0 children)

How do we know it's "new", or different in any way?

I certainly don't, but numerous different sequences have been identified. If the immune system makes you immune to each successively, it stands to reason that each time is a new strain. Of the physically identifiable part of the dis-ease. Is it viral at all? Hell if I know. It is CALLED viral and I guess for the lack of absolutely objective information, I use the language as it exists, if only for the sake of being able to communicate.

How do we know it travels infectiously?

This is only postulated of course.