You would have to be blind to not see the what diseases do to wild animals...If you think that VCOVID-19 is a new phenomena with humans you better do a little more research to find that humans have a never ending job of battling microscopic diseases and viruses....
All over the world? All at once? That is a little far fetched. Rachel Carson's book, Silent Spring, reported the unintentional consequences of bad science. But this too convenient event has all the earmarks of purposeful intent.
Yes all over the world. All at once. Just like smallpox, the plague, the Spanish flu, the common cold and basically every transmittable disease. Entire populations have been decimated by disease before the concept of the scientific method was ever developed.
It's not even that this happening hasn't been predicted for decades. Intent has as much to do with it as intent causes the sun to rise.