eradicated from the planet one virus that afflicts humans, and that s smallpox. that s eradication. elimination means where you haven t eradicated it from the globe, but you ve essentially eliminated it, for example, from a given country, take the united states. so what have we done? we ve done that with measles, and we ve done that with polio with. but there were three factors that went into our ability to do that. one, measles and polio is not a virus that changes. the measles that we had 20, 30 years ago is the same measles we have right now. number one. number two, either infection-induced or vaccine-induced immunity is virtually lifelong. and ors as a matter of fact, that s what we had. and then you have a very, very effective widely acceptable and widely accept ised vaccination campaign. that s why we were able to eliminate it.
needs, we are very actively coordinating its provision and that assistance is getting there. but we ll probably have more to say in the next couple days. thanks, everyone. so secretary of state antony blinken there he might be taking another question. let s listen. are they doing it deliberately? we ve certainly seen in the past that one of russia s methods of war is to be absolutely brutal in prying to cow the citizenry of a given country. and that includes at the very least indiscriminate targeting and potentially deliberate targeting as well. we re looking very closely at what is happening in ukraine right now, including what is happening to civilians. we re taking account of it, we re documenting it. and we want to ensure among other things that there is
blocking travel from a given country, just give us time to assess it better, that s the reason for doing that, not any reason for panic, but we want time to fill in the blanks of what we don t know right now. reporter: while the omicron variant is officially detected in the us researchers believe the ability to enter human cells means the variant is likely already here. i would not be surprised if it is. we have not detected it yet, but when you have a virus that is issuing this degree of transmissibility and you already have travel related cases that they have noted in israel and belgium and other places, when you have a virus like this, it s almost invariably is going to go essentially all over. reporter: israel has taken additional step of setting down the borders to outsiders completely taking place for two weeks and they also resumed the cell phone monitoring plan they
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