Congress did decide this already by passing legislation a century ago granting temporary increased powers to the executive in event of national emergency and its declaration.
> It is definately distopian for employers to decide anything on this matter -they are not sibject to dempcratic scruitiny.
Government employment is already dystopian and private employers can have any requirements they like short of discriminating against religion, race, disability, etc. There are no federal protections for political disposition.
> And there are many methods of reducing covid infection avaliable - installing air purifiers, improving ventillation in schools, Upper-Room Ultraviolet Germicidal Irradiation (UVGI).
The virus was already circulating due to unpreparedness and slow reaction by the administration in office. Had we seen a two week stay home order in February, the crisis would likely have been averted, but the executive was overly concerned about the economy, which tanked anyway regardless of putting 300M+ Americans at risk of infection, illness and/or death.
> If situation is so serious, whu are none of those being mandated? Now we know current vaccines give you immunity for like 6 months and new variants appear very rapidly.
Again, COVID was already circulating by late February 2020, and if two vaccinations a year are required from now until the end of time, it is still a very small price to pay, a minor inconvenience at worst with the benefit of increased resistance to infection, severe illness, hospitalization, and/or death.