assertions without evidence
"we are at far more risk from Earth based diseases spreading from previously isolated locations than we are from Martian microbes."
sorry, but no one knows.
"Your stance that Martian microbes are likely to be highly dangerous is as ridiculous as Hoyle's decades old claim that flu comes from space"
again, while hoyle's hypothesis appears to not be proved by the evidence, this has nothing to do with the Mars back-contamination problem.
ep