Articles keep popping up saying that covid immunity doesn't last. Having recovered from covid is no guarantee a person cannot get infected for a 2nd time, and this time develop serious symptoms. One doesn't know what the first bout may have done to the body unless one gets a complete health check when they get better.
I cannot think of any other skating community that has flouted protective measures more than the folk at Russian competitions. Their skaters certainly shouldn't be banned from WC for that, but I am not surprised in the least to see people generalize and distrust their team to be considerate towards other teams at WC. Mishin will probably need to find a substitute to go in his place, since he obviously is incapable of wearing a mask over his nose. No matter how famous, old or revered they are, I hope noone gets any exceptions from the safety measures at WC if they want to protect everyone.
Also, who cares if all Russians are vaccinated? Not everyone in the world wants to get a vaccine, and not everyone can get it, for health reasons or otherwise. Being vaccinated doesnt mean you can't be infected, cause others to catch it and develop severe symptoms. It protects only the vaccinated person. Nothing wrong with simple protective measures like masks in place, until the virus dwindles out.
That said, if WC can go forward with some sort of bubble, it should. Skaters willing to go deserve a chance to compete and get WS points. It's a tough choice for the ISU between safety and opportunities, but if covid ends up spanning another year or two, we may lose an entire generation of skaters if most competitions get cancelled.