I worked in the oil industry for 38 years, I was working in a alberta BC area. Black out and was taken in to the hospital. Never found anything. But my work said getting a doctor's note saying you are fit for work. Went home and started testing, never found anything until I had a MRI. They found ms. I was immediately put on cpp and retired. Now for 5 years i get infusions every 6 months. And have had multiple COVID and flu shots. Now live alone and can't date because of my M.S. go figure.