evidence: After Hearns’ Instagram post was widely interpreted as confirmation Hagler had an adverse reaction to the COVID-19 vaccine, he went back on the social media app to add some context. [...] Days later, USA Today reported that Hagler’s death was not caused by the COVID-19 vaccine. However, no cause of his death has been announced and Hagler’s wife later said it "wasn’t the vaccine that caused his death." [...] Conspiracy theorists on social media cited the recent deaths of other aging high-profile former athletes like Hank Aaron and Leon Spinks who had been given the COVID-19 vaccine before dying as purported proof, but their deaths were never officially linked to taking vaccines.