So far there hasn't been any widespread outbreak.

When you overwrite, it makes it more difficult to retrieve. You can definitely lose files.

It only infects if you do click.

Anyone who was alive during the outbreak of the bubonic plague in the 14th century experienced something terrifyingly close to the widespread death and chaos of an apocalyptic event.

This is a very widespread system.

Good preparation and prevention can help avoid an outbreak. Government preventive measures have been effective so far, but it is further tightening controls on the virus.