The latest blog post links to a french wikipedia page for Pierre (very sparse):
https://fr.wikipedia.org/wiki/Pierre_Jabouille. That page links to an English-language obituary, by Delacour and Willoughby P. Lowe.
That obituary shares many phrasings with Delacour's French version.
It's briefer in general, with just a few explanations added for the benefit of a non-French audience.
But it includes a bit more detail about Pierre's health late in life: "He nearly lost his eyesight and the use of his legs." Which sounds to me like it could be tertiary-stage syphilis.