Well we don't have immunity for most of the bacteria on earth and we're doing just fine. Chances of coming into contact with a pathogen like smallpox that specifically target us are pretty slim.We would have a better chance on Mars than a planet with existing life. If there is life it would include bacteria and micro organisms that we have no immunity too.
They had no plan period. Nothing on paper to get there or how to survive. Personally for me it's not getting there that's the problem but rather the turnaround times. Taking months to get to your destination isn't really ideal. There's just too much that can happen and it will take years to deal with any issues.I think you misunderstand.
It was only not feasible because they had no plan for funding, their plan was to find some people and then generate a large amount of publicity and then find away to turn that publicity into money.
Its definitely possible to get to Mars with the right funding. Elon will do this, firstly because he will get the funding but also because he has proven again and again that his ideas work.
