Didn’t say he had Covid. Said he was being held out because of Covid protocols. It could be very temporary and that he just needs to be cleared.
That said the reason for booster shots is because the efficacy of the vaccines weaken with time. Has Mika or his teammates gotten boosters? Might be a good idea.
Also no vaccine is 100%—something that seems lost on all the vaccine skeptics. If a pharmaceutical says that such and such is 98.5% effective it’s conceding that it might not work for 1.5% of those who get that vaccine and it’s not just Covid vaccines—it’s every vaccine from the flu to the measles to polio. As well elderly people or those with immunity issues may not have as effective a response—see Colin Powell.