Historically, Human Language was the first non-biological virus...

And (jokingly!) certain pieces of computer software (including but not limited to a certain popular Operating System made by a certain company in Seattle) could be the second!

LLM's by comparison, if they are a virus, are a distant third! :-)

(And of course let's not forget the virality of Religions and Politics, local, regional, international, etc., etc., and the associated TV News Pundits who are always willing to discuss those things -- people with opinions masquerading as actual Journalists, and a few actual Journalists masquerading as people with opinions!)

Point is, Human Language itself -- may have been the first non-biological virus!

:-)

(Disclaimer: The above was written in a spirit of jest, for comedy purposes only! :-) )