This article is blatantly false; a single tweet from 7 years ago which was apparently a sarcastic response to a real anti-vax comment does not make her 'Anti-Vaxx'.

She was reportedly current on her flu shot when she died.

I don’t really feel like gloating over someone’s death.

The flu also isn’t among the bestexamples for the success of vaccines. It is both less effective and far more cumbersome than, for example, MMR.

Last I checked, it was not even recommended for healthy young adults, where the risk of death is rather low.

A more accurate title would be "Someone who once tweeted something negative about vaccines dies, probably from Swine Flue", but it wouldn't get the clicks.

Maybe take the grave dancing and bury it deep inside where no one else has to see the idiocy?

snopes has a bunch of breadcrumbs if you scroll down and continue to read them all, an interesting scenario emerges.

https://www.snopes.com/fact-check/bre-paytons-death-strange/

I would also add, the Flu shot is not a sure thing it is a best guess as to the serotypes that will probably be in circulation based on WHO monitoring of global serotype observation. BTW im not an antivaxxer, I have very extensive knowledge regarding the particulars of influenza, and vaccine production.