These clots have been reported by various sources for over half a decade, and still nothing is being done about it.

At least studies are being published confirming the problem and expanding on what is known about it.

https://www.thefocalpoints.com/p/breaking-multi-year-study-of-808

A new peer-reviewed study in the International Journal of Innovative Research in Medical Science has officially documented a phenomenon embalmers have been reporting for years: unusual white fibrous structures found in the veins and arteries of deceased individuals.

The study was led by Thomas F. Haviland, a retired U.S. Air Force Major, mathematician, and data analyst, along with Laura Kasner and Daniel Santiago, PharmD. Over four consecutive survey years from 2022 to 2025, the researchers collected responses from embalmers in the United States, Canada, United Kingdom, Australia, and New Zealand.

(Lots more, including horrible images. No paywall).