"Absent from all the news coverage and ensuing obituaries has been Hagler’s cause of death.
That lack of disclosure drew attention to a couple of social media posts from fellow boxing legend Thomas “Hitman” Hearns, with whom Hagler had arguably his greatest triumph in the ring back in the 1980s. Hearns said on Saturday prior to Hagler’s death that his former rival was suffering health problems due to “the vaccine,” using an exclamation mark for emphasis."

https://newsone.com/4105374/tommy-hearns-marvin-hagler-cause-death/

https://www.foxnews.com/sports/marvin-hagler-death-anti-vaccine-messages-thomas-hearns-quiet-noise