Why not? To what would Congress would limit the authority then, if not to what it explicitly says they are allowed to? I mean, there must be some limits on what CDC is allowed to do based on that statue, as it would be completely absurd to expect that Surgeon General gets all powers of federal government limited only by what “may be necessary in his judgment”. So, if there are some limits, why not understand those in terms of what that very section explicitly lists?
> So, if there are some limits, why not understand those in terms of what that very section explicitly lists?
Because the list ends with "and other measures, as in his judgment may be necessary.", and the text forces you believe that either a) the federal government intended to express a belief (in the same bill that officially gives the federal government quarantine authority) that disease could be contained via sanitation and pest control, or that b) they intended to give the Surgeon General a lot of latitude.