Exactly- there is no way to stop incoming diseases / conditions without the use of non- negotiable quarantine. Even then, the incubation period of some diseases is long enough that quarantine would not be practical (assuming it would be even for one full day (24 hours), which I doubt would be nearly long enough to be useful).
England does not have rabies on the island and they are anxious to avoid it- wisely so IMO. Try getting a dog into the UK- automatic quarantine with few, if any, work- arounds (random dogs being brought into the UK as pets). And the quarantine is fairly long for rabies at 21 days, where would '21 days worth' of people entering the UK go? Who would pay for that?
1.19 billion (yep, billion) tourists visited the US in 2005 alone. How many of them would visit if there was a 10 day or longer quarantine?
And as far as restricting people from entering from a particular point of origin, that would be far easier.... when it worked. If I am not mistaken, I believe the guy referenced in the Reuters article traveled through Europe to get here.
Brian
Only caught it in passing but I thought I heard that he was indeed questioned and had temp taken at some international airport; as part of routine he answered the questions asked of him and had no fever so unless they start a 21 day quarantine on anyone and everyone coming out of one of the known countries there is no way to know....