Except that’s not true: https://www.google.com/amp/www.telegraph.co.uk/science/2016/07/28/moon-disease-apollo-astronauts-more-likely-to-die-of-heart-probl/amp/
What of breathing the micro-particle moon dust contaminant? If it passed through the lungs into the blood, the heart’s arteries received a dosing. Counts of the variant blood white cell were found to jump upward for anyone exposed to Lunar dust, per NASA’s space surgeon in charge of medical testing.