Reading in a bit more, the second post links to a comment thread where further down they talk about post-it notes.
The original thread about the post its had some updates along the lines of: someone in comments suggested OP get a CO detector. OP says “ya know, I have one. Maybe I should take it out of the box and plug it in.” Later OP said their detector rated the CO at 100ppm! They went to the hospital lol.
Last update I saw was four months after - OP was guessing their recovery would go on for another year, and there was likely some permanent damage but overall they felt confident at getting back to 80%, maybe even 99%.
The original thread about the post its had some updates along the lines of: someone in comments suggested OP get a CO detector. OP says “ya know, I have one. Maybe I should take it out of the box and plug it in.” Later OP said their detector rated the CO at 100ppm! They went to the hospital lol.
Last update I saw was four months after - OP was guessing their recovery would go on for another year, and there was likely some permanent damage but overall they felt confident at getting back to 80%, maybe even 99%.