Wickramasinge has form as long as any kook. Way back in the '80s he and Fred Hoyle noted a weak correlation between flu outbreaks and earth passing through some dust cloud causing micrometeorites. Except of course it only accounted for the Northern Hemisphere, can you say Hemispherecentrism professor? And if that wasn't enough shortly afterwards virologists demonstrated that most seasonal flu is the result of mixing of bird and mammalian flus in pigs. There used to be millions and millions of pigs living in people's backyards with chickens all over Asia. Bird flu has done a lot to change that, people in Asia are neither stupid or have death wishes.
But undeterred, even by Fred Hoyle's death the professor has continued to see life everywhere he looks and to ignore the sequence evidence here on earth, EVERYTHING is RELATED to EVERYTHING ELSE. It's relatives all the way down, including the turtles. Even the archaea are related to the bacteria though the split is very ancient.
And of course the chance that a virus so well evolved to bind to human nasopharynx cells, avoid intracellular antiviral measures etc. etc. is just silly. We are surrounded by viruses all the time, plant viruses, bacteriophages (our guts are full of them), worm viruses, insect viruses, fish viruses, amphibian viruses, reptile viruses, feathered dinosaur viruses and mammalian viruses and only a very small fraction have a scooby chance of even infecting us, let alone causing disease. All are exquisitely evolved and adapted. And we are RELATED to all of them.