If airlines wont be screening every pilot with a cardiac MRI, troponin, and d-dimer tests, they should make Doxycycline obligatory and free for Pilots! Walter M Chesnut wrote about pilots and spike in his latest Substack article published on Jun 22 "PILOTS, PASC AND THE SPIKE PROTEIN…" High altitude and amyloidosis exacerbation; Why Doxycycline works