X user posted about 'Corona virus' in 2013, but there's no reason to believe post was about COVID-19

The first reports of coronavirus — a group of viruses that includes COVID-19 and other diseases — go back to the 1930s.
CNET

OS.X Macarena 'virus' (#2): No viable threat posed; Not exploiting a Mac OS X bug; not a 'warning' of more viruses to come

Intego is the latest publisher of Mac OS X antivirus software to document and claim protection against the largely innocuous OS.X Macarena virus -- a simple C program, not found in the wild (outside ...
The Hill

What is Disease X? The hypothetical virus world leaders are preparing for

(NEXSTAR) — Conspiracy theories are circulating online as world leaders prepare to discuss readiness for a hypothetical virus known as “Disease X” at this week’s World Economic Forum in Davos, ...
CNET

New proof-of-concept malware demonstrates virus for OS X

Clapzok.A is a new malware approach that, with current (albeit limited) loopholes in OS X, can spread among binary files when executed, making it one of the first-known, true computer viruses for OS X ...