The claim about his health and the COVID-19 vaccine is consistent with a common conspiracy theory that spread online during the pandemic, falsely attributing numerous famous peoples' deaths to the vaccine. We have previously fact-checked such claims about Betty White, Lisa Loring and even Russian opposition leader Alexei Navalny.

Over the course of his storied music career, rock icon Ozzy Osbourne faced health battles with substance abuse and Parkinson's disease.