Altitude sickness

Well I was bracing myself for all the classic symptoms, dizzyness, feeling nautious, unable to breath or walk far yeah welcome to La Paz! But I did'nt experience any of that just a shortness of breath. Although I don't want to speak too soon. I'd met some backpackers that had had a bad time of it, passing out needing to go to the hospital for oxygen. You read that altitude sickness is very serious and in somecases can result in pulminary adeama (badness, fluid in the lungs) and death! So far so good for me.