On March 13, the boxer called Marvelous Marvin Hagler died from natural causes near his home in New Hampshire.
As if on cue, anti-vaxxers hijacked this claim to further their narrative about unsafe vaccinations. In a now-deleted post on Instagram, Hearns posted "this is not an anti-vaccine campaign." Hearns' later Instagram post said that he leads with love and respect towards the Hagler family and requests that his post be considered an apology for causing any negative feelings.
On 15 March 2021, Kay clarified on Facebook that Hagler's death was not caused by the vaccine. Additionally, Hagler's website specifically states that he died of natural causes on 13 March 2021. Finally, there isn't any publicly accessible information that could lead to the conclusion that Hagler's death was related to COVID-19 or any COVID-19 vaccine.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.