Surely you need to have actually had the vaccine for the vaccine to have been the cause?Will be interesting to see whether any AFL players will have any heart issues when pre-season training ramps up, or during games next year? We are seeing this happen all over the world with professional athletes recently. Soccer players in particular have been dropping like flies (Traore, Wyke, Eriksen, Aguero, etc). That's the tip of the iceberg too. Some say that players in cardio intensive sports are more at risk than others. So there is some concern for AFL players.