The potential impact of long COVID would probably end a footballer's career. It can be similar for anyone but if it hits an elite athlete they're probably done in terms of elite sport. It has to be said though, the reason there are so many COVID cases within Premier League football is the fact that so many people are ignoring or flouting rules within those bubbles.
They're hardly being punished for this. The PL should either give them a hefty fine or significant suspension. The clubs probably will but it has wider implications for the game itself.