中山肛肠治疗贵不贵(中山结肠出血) (今日更新中)

Two studies released this week are offering some hope for parents and school districts looking to reopen this month across the country.The studies, one from the United Kingdom and the other from Australia, were published in the journal The Lancet Child & Adolescent Health this week and try to help inform ongoing discussions around reopening schools.A team in Australia was able to look at results from students who remained in class between January and early April.Researchers found even though schools remained open in New South Wales, children and teachers did not contribute significantly to the spread of Covid-19 -- because good contact tracing and control or quarantine strategies.Their data showed that while 27 children or staff at 25 schools and daycares had attended school while infectious with Covid-19, only 18 other people later became infected.That’s an attack rate of 1.2 percent. Overall, the attack rate of child-to-child transmission was 0.3 percent, while the attack rate of adult staff member to another adult staff member was 4.4 percent.“With effective case-contact testing and epidemic management strategies and associated small numbers of attendances while infected, children and teachers did not contribute significantly to COVID-19 transmission via attendance in educational settings,” the Australian team of researchers state in their report.In the British study, researchers looked at models on returning to school with different scenarios, including increased testing, isolation measures for positive cases, and levels of contact tracing.The models the researchers ran assumed that 75 percent of those with positive test results are contacted, provide information for contact tracing and isolate, and that 90 percent of that person’s contacts are reached by contact tracers and asked to isolate.The team assumed between 59 percent and 87percent of symptomatic people in the community would need to get tested at some point during their infection, testing results would be returned in one day, and those asked to isolate would do so for 14 days.Researchers made it clear that these levels would be needed to reopen schools.“However, without these levels of testing and contact tracing, reopening of schools together with gradual relaxing of the lockdown measures are likely to induce a second wave that would peak in December, 2020,” their report stated. “To prevent a second COVID-19 wave, relaxation of physical distancing, including reopening of schools, in the UK must be accompanied by large-scale, population-wide testing of symptomatic individuals and effective tracing of their contacts, followed by isolation of diagnosed individuals.” 2683

TULSA, Okla. — President Donald Trump pressed ahead with his comeback rally in the midst of a pandemic Saturday by declaring “the silent majority is stronger than ever before."But what was meant to be a show of defiant political force in Tulsa, Oklahoma, was instead met with thousands of empty seats and new coronavirus cases on his own campaign staff.Watch the rally below: 383

U.S. Senate candidate Roy Moore published an open letter to Sean Hannity on Wednesday night pushing back against allegations of sexual abuse that have placed his campaign at the center of a national firestorm and prompted prominent members of the Republican Party to call on Moore to withdraw from the race.In the letter, which came one night after Hannity said he would give Moore 24 hours to explain inconsistencies in how he has addressed the allegations before calling on him to step aside in the race, Moore suggested he was the victim of a political hit job."I am suffering the same treatment other Republicans have had to endure," Moore wrote Hannity.Moore faces accusations from multiple women that he pursued sexual relationships with them -- and in two cases engaged in sexual assault -- while they were between 14 and 18 years old and he was in his mid-30s.Moore denied dating underage girls, but only specifically addressed allegations from two of the women. He said "at the direction of counsel" he "cannot comment further."Moore said in his letter to Hannity that he was "in the process of investigating" what he characterized as "false allegations."On his program Tuesday night, Hannity demanded an explanation for a signature in a yearbook that appeared to have come from Moore. Despite Beverly Young Nelson -- one of the woman who accused him of sexual misconduct -- producing an old yearbook she said bore his signature, the embattled Senate candidate claimed he did not even know her."My signature on the order of dismissal in the divorce case was annotated with the letters 'D.A.,' representing the initials of my court assistant," Moore wrote Hannity. "Curiously the supposed yearbook inscription is also followed by the same initials—'D.A.' But at that time I was Deputy District Attorney, not district attorney."Moore added that he believed the "initials as well as the date under the signature block and the printed name of the restaurant are written in a style inconsistent with the rest of the yearbook inscription."The support of Hannity and other conservative heavyweights is crucial for Moore as he faces intense controversy. Thus far, Moore has responded to the allegations against him largely by dismissing them as supposed "fake news." If Hannity were to turn on him, it would signal to Republican voters in Alabama that there is merit to the allegations and that the reports in the media are not a political smear job as Moore has framed it.Hannity responded to Moore's letter at the end of his Wednesday night program and said that the allegations against Moore "are beyond disturbing and serious."But Hannity declined to drop his support for Moore, suggesting additional time and information is needed to render a decision. He ended his television show saying the decision ultimately lies with the people of Alabama and should not be decided by him or other conservative or Republican leaders."I am very confident that when everything comes out, they will make the best decision for their state," he said.  3054

TRENTON, N.J. (AP) — Former New Jersey Gov. Chris Christie says he has been discharged from a New Jersey hospital after a week there following his announcement that he had contracted the coronavirus. Christie said in a Twitter post Saturday that he had been released from Morristown Medical Center and would have “more to say about all of this next week.” Christie announced Oct. 3 that he had tested positive for COVID-19 and said hours later that he had checked himself into the hospital after deciding with his doctors that doing so would be “an important precautionary measure” given his history of asthma. 618

Twitter CEO Jack Dorsey says "we're ready to question everything" about the social networking site that has been overrun by spam, abuse and misinformation.Dorsey says he and his team are working extensively behind the scenes to stamp out some of the harassment and hate speech that has generated bad headlines lately.But it is a long-term effort, he says, and he is reluctant to commit to an exact timetable for certain changes to Twitter's foundation.In twelve years, "we've changed a lot. But we haven't changed the underlying fundamentals," Dorsey told CNN in an in-depth interview at the company's headquarters on Friday.The basic fundamentals are what he is examining now. For instance: What does Twitter incentivize its users to do?"Every product decision we make is 'telling' them to do something," Dorsey said.So he is thinking about how to help users follow topics and hashtags, not just people."We are aware of some of the silos and how we're isolating people by only giving them crude tools to follow accounts. We need to broaden our thinking and get more back to an interest-based network," he said.Related: Twitter's Jack Dorsey: 'We are not' discriminating against any political viewpointDorsey is also rethinking how follower counts and "likes" on posts are displayed, because the race to gain followers and likes may encourage outrageous behavior.His view is that Twitter needs to be much more "transparent" and open about its actions. But that transparency, some of which was on display during Dorsey's media tour this month, means asking questions without actually answering them.Among the questions Dorsey asked in the CNN interview: "How do we earn peoples' trust?" and "How do we guide people back to healthy conversation?"While he may get credit for asking big, philosophical questions about how his site operates, Dorsey remains vulnerable to criticism about Twitter's inaction.He responded to that by saying "we are taking a lot more action than we ever have in the past." But much of the action is invisible to users, he asserted.For example: The disabling of bot networks and other suspicious accounts. Dorsey said Twitter challenges "10 million accounts every single week to see if they're automations or humans," and takes action accordingly.But Twitter's stock plunged last month when its quarterly earnings report showed a decline in user growth, which the company attributed to its efforts to clean up the site, akin to gardeners removing weeds.Nonetheless, Dorsey is committed to what he calls "conversational health" -- the quality of an exchange on Twitter -- which he is trying to measure with the help of two research groups. He said investors should take a look at the long-term trends: "We see this as necessary and right and we believe in it and we have conviction around it, and we'll take the hit in the short term."Related: Twitter is purging suspicious accounts from your follower countHe also asserted that "over the short term, a lot of this work is invisible, and over the long term, it starts to add up."As for some of the specific changes, like a rethinking of the like button, Dorsey was reluctant to talk about a timeline."We're looking and thinking about all these things right now," he said. So: By the end of the year? "I worry about a time frame like that," he said, "because we also need to take into consideration -- we're a small company. I mean we, in comparison with our peers, we're a small company, but we have this outsized impact and I believe, importance."Later, he added, "We have to understand first the problem we're trying to solve, like what incentives we actually want to drive; not just what we want to remove, but what we want to drive." But he said he knows he wants incentives "that encourage people to talk and to have healthy conversation." 3824

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