by more, we are joined senior scholar at the jon hopkins center for health security.hank you for joining. what you make of the who statement. are they taking the right outoach and not calling travel restrictions and giving high praise to the approach from china? >> i think they are. public healtha emergency of international concerns and i'm glad the committee finally issued this. this is a warning to the world that it is a dangerous situation. thatis only the six-time such a declaration has been made. i agree that the chinese are andg an exceptional job trying her up measures to control it, but frankly i think it is too late. even before the outbreak, it was wase out-of-control -- it already out of control. >> i wonder how much pressure there might have been to hold off on declaring this and international emergency. as the yuan organization, it has to be mindful on how it plays globally. do you think there was any pressure on the who? >> i have little doubt that it was part of the equation. the main thing that the world realizes is this is a dangerous situation and i

toner is the senior scholar at the jon hopkins help for senior security. a quick market check.are off of our lows. major indices down 1.2%. markets in asia are closed, continuing the lunar new year, keeping them close for one more week. the vix is elevated, as our treasuries. this is bloomberg. ♪ mark: i'm mark crumpton with bloomberg first word news. several republican senators are leaning toward calling for our national security advisor john bolton to testify at president trump's impeachment trial. susan collins says the report about bolton's book strength the case for witnesses, and utah senator mitt romney spoke to reporters on capitol hill. >> i think it is increasingly likely that the republicans will join those of us who think we will hear from john bolton, and whether there are other witnesses and documents, that's another matter. john bolton's relevance to our decision has become increasingly clear. republican lisa murkowski says she is curious about what bolton may say it called to witness. day after ancome a expose of report about bolton's yet to be published book. t

professor of epidemiology, international health, and molecular microbiology and immunology at the jon hopkinsomberg school of public health. why is the disease we call measles back? william: yes. we have seen a resurgence of measles in the past couple of years, with 2019 being a particularly bad year. this resurgence has not only been in the united states, but throughout the world. we have seen resurgence of diesels in almost all the regions of the world, europe, southeast asia, south america. the fundamental reason why measles is back is low vaccine coverage with the measles vaccine. we have a very safe, effective measles vaccine. for various reasons, people are not getting the vaccine or are refusing to get the vaccine. measles, as i understand, was eliminated in the united states years ago, so why shouldn't they be allowed -- let me play doubles advocate. if they feel like measles should not be here, because it is gone, why would they get it? william: that is an important question. it has to do with what is meant by elimination. you are right. the united states had eliminated measles. the

we have more colleagues in this , jon across the u.s. hopkins, many other institutions are working very closely monitoring this. even today, the journal in the u.k., they published five articles about this disease. two of the articles have really detailed data. david: thank you so much for joining us. we will have more coming up in the next hour on bloomberg radio. this is "balance of power" on bloomberg television and radio. coming to you from new york. ♪ hopkins, howard, many other david: this is "balance of power" on bloomberg television and radio. i'm david westin. much of the talk at davos this week was about climate change. in this weeks episode of bloomberg wall street week, we sat down with larry summers, roger ferguson, and jetblue head of sustain a steep -- sustainability to discuss what could be done in the airline industry beyond merely talking about it. >> each airline flies planes differently. what we are doing is taking care of the carbon on the customer's behalf without asking them to make a sacrifice. we are not saying squeeze y

jon stewart is all here and now it was go. >> each exhibit is an extraordinary example of ordinary people to change the entire nation. >> the news artifacts are being removed and johns hopkinsdies and they hope to find a new home in d.c. but for now decades of work and life sacrificed to bring into the world needs a new home. >>> ♪ >>> 6:57 a.m. and a look at today's top stories. around is calling for retaliation . >> the tents and between the u.s. and iran have been steadily growing since the trump administration pulled out of the around nuclear deal in 2018. >> a funeral procession for qassam soleimani, the iraqi general killed in a drone strike. distract the u.s. attack prompting antiwar protests across the country in two in the bay area. at 3:00 p.m. in the afternoon in san jose. the gathering is planned at city hall . >> today it might be waking up with scattered showers here and there and they peter out toward the midday hours and it will calm down and be mostly cloudy but we might see the sunshine here and there. cloudy but cooler temperatures and before that clears it will be an absolutely beautiful start to our work week before the chance of rain and returns at the