Strange rashes, vision problems, cancer threats: one astronaut's life after a year in space

Thanks for sharing Cpl Julio Rosa. A friend and USMA classmate has the most time in space of any US astronaut.
"Aug 3, 2017 - Having completed his fourth mission in 2016, Expedition 48 Commander Jeff Williams officially spent more time in space than any other U.S. astronaut. Williams has spent 534 days in space, making him first on the all-time NASA astronaut list." Earlier he surpassed 520 days living in space which broke Scott Kelly's previous record for most cumulative time spent in space by a U.S. astronaut, set during Kelly's year-long mission.
Thanks for mentioning me Maj William W. "Bill" Price

I'm by no meamsmsurprised; cosmic radiation in spaceflight is truly a very serious problem. That's why modern nonsense about going to Mars, while perhaps understandable, is, unfortunately, total gibberish, at least in my view. Until spaceflight to and from the Moon is absolutely routine, anything other than robotic efforts to any other solar system body is totally impossible for the present, at least to my way of thinking. Also, the level of software defelop!emt for lunar flight was staggering for Apollo, to do a human Mars flight would be exponentially more so, with yet more chance of error, as well, I realize that might put rather a damper on such aspirations, however, I am reasonably sure I'm right, for the most part, many thanks, I'd be eager for discussion.