I sure as heck remeber going to the hospital with a 107 fever, coughing up nasty green crap out of my lungs as my pig flu turned into pneumoia.
Sickest I’ve ever been in my life, and I’ve shot, shelled, crashed, burned, poisoned, and had my apendix out -— twice (it grew back).
I had the Hong Kong flu and know what you mean - that was the only time in my life I wished I were dead. I was lucky it didn’t develope into pneumonia, like yours did. You have my sympathy.