Glad to see that education systems besides ours have collapsed. Microorganisms from the surface can stay aloft for a long time, brought by sandstorms, winds, etc.
The shorter wavelengths of UV (Below about 260 nm) are called the "Vacuum Ultraviolet" because they do not penetrate the atmosphere and are not found at the surface. They are wonderful for sterilizing clean rooms, etc. because _they kill pathogens_.
Near space is an inferno of radiation and free radicals...UV, cosmic rays, solar wind, ozone, and atomic oxygen. If SARS can only live a day or two exposed to sea level atmosphere, there is no possibility it arrived from space, and little possibility it would be opportunistic on mammals if it did.
What we have here is a paper desperate for stories, and possibly a drug-addled or mercury poisoned mental defective. The mere fact that this appeared in print, anywhere except _The Onion_, _Mad Magazine_, or _The Lampoon_ is a disgusting commentary on our times. Were the theory not propounded by an utter imbecile, I would call it a blasphemy against Science.
Did you see the article in Science a few years ago, about a Mars rock that some researchers thought might contained fossilized microbes? What is your opinion of that?
p.s. I wasn't convinced.