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This week marks Lead Poisoning Prevention Week, and according to the Centers for Disease Control and Prevention, 3.6 million Americans face a risk of lead poisoning from lead-based house paint.The CDC says that even low levels of lead in the bloodstream can cause cognitive impairment in children that is irreversible.“As we observe National Lead Poisoning Prevention Week, we urge people to take action,” said Patrick Breysse, PhD, CIH, Director of CDC’s National Center for Environmental Health. “Together, we can eliminate childhood lead poisoning as a public health problem by strengthening blood lead testing, reporting, and surveillance, while linking exposed children to recommended services. CDC is committed to help address this threat and improve health outcomes for our nation’s most vulnerable citizens – our children.”The CDC is encouraging parents to get their children’s lead levels checked by a doctor. The CDC says that the screening is covered for those on Medicaid.While homes older than 42 years old may contain leaded paint, other risks could come from the environment, and exposure to lead-containing products such as antique cookware and leaded crystal glassware.For more information on lead poisoning, click here. 1245

TIJUANA, Mexico (AP) — Migrants approaching the U.S. border from Mexico were enveloped with tear gas Sunday after a few tried to breach the fence separating the two countries.U.S. agents shot the gas, according to an Associated Press reporter on the scene. Children were screaming and coughing in the mayhem.Honduran migrant Ana Zuniga, 23, said she saw migrants open a small hole in concertina wire at a gap on the Mexican side of a levee, at which point U.S. agents fired tear gas at them."We ran, but when you run the gas asphyxiates you more," she told the AP while cradling her 3-year-old daughter Valery in her arms.RELATED: Caravan marches toward US border in show of forceMexico's Milenio TV also showed images of several migrants at the border trying to jump over the fence. Yards away on the U.S. side, shoppers streamed in and out of an outlet mall.U.S. Border Patrol helicopters flew overhead, while U.S. agents held vigil on foot beyond the wire fence in California. The Border Patrol office in San Diego said via Twitter that pedestrian crossings have been suspended at the San Ysidro port of entry at both the East and West facilities. All northbound and southbound traffic was halted.Earlier Sunday, several hundred Central American migrants pushed past a blockade of Mexican police who were standing guard near the international border crossing to pressure the U.S to hear their asylum claims. They appeared to easily pass through without using violence, and some of the migrants called on each other to remain peaceful.RELATED: Woman with child injured while scaling border fenceThe migrants carried hand-painted American and Honduran flags and chanted: "We are not criminals! We are international workers!"A second line of Mexican police carrying plastic riot shields stood guard outside a Mexican customs and immigration plaza.That line of police had installed tall steel panels behind them outside the Chaparral crossing on the Mexican side of the border.Migrants were asked by police to turn back toward Mexico.More than 5,000 migrants have been camped in and around a sports complex in Tijuana after making their way through Mexico in recent weeks via caravan. Many hope to apply for asylum in the U.S., but agents at the San Ysidro entry point are processing fewer than 100 asylum petitions a day.Irineo Mujica, who has accompanied the migrants for weeks as part of the aid group Pueblo Sin Fronteras, said the aim of Sunday's march toward the U.S. border was to make the migrants' plight more visible to the governments of Mexico and the U.S."We can't have all these people here," Mujica told The Associated Press.Tijuana Mayor Juan Manuel Gastelum on Friday declared a humanitarian crisis in his border city of 1.6 million, which he says is struggling to accommodate the crush of migrants.U.S. President Donald Trump took to Twitter Sunday to express his displeasure with the caravans in Mexico."Would be very SMART if Mexico would stop the Caravans long before they get to our Southern Border, or if originating countries would not let them form (it is a way they get certain people out of their country and dump in U.S. No longer)," he wrote.Mexico's Interior Ministry said Sunday the country has sent 11,000 Central Americans back to their countries of origin since Oct. 19. It said that 1,906 of them were members of the recent caravans.Mexico is on track to send a total of around 100,000 Central Americans back home by the end of this year.RELATED: 3488

Those in charge of the race for a COVID-19 vaccine are trying to keep the process transparent.“Those checks aren’t just critical to the development of a safe and effective vaccine, although they are, they are also essential to maintaining and inspiring the public trust,” said Ana Mari Cauce, President of the University of Washington.Johns Hopkins and the University of Washington hosted a virtual symposium. Dr Anthony Fauci took part, as did the head of Operation Warp Speed, the public and private partnership overseeing COVID vaccine therapies.He's vowed to resign if political pressure impacts a vaccine being safe and effective.“We expect them to read that or have a first look at their efficacy outcome within the next several weeks,” said Dr. Moncef Slaoui, Chief Advisor for Operation Warp Speed. “Nobody can really say when, but the expectation would be that this would happen between the month of November and December.”There are detailed plans and protocols at some 25 manufacturing sites across the U.S.Independent experts with decades of experience in Ebola, Zika and HIV gave perspective on COVID-19 vaccine trials.“We use 30,000 and if you actually calculate how many is needed for efficacy, most companies would do it around 15,000, but we fortunately have the funding to be able to do larger trials,” said Dr. Larry Corey, a vaccine and infectious disease expert.The experts promised that phase-3 trial data would be publicly vetted during a broadcasted advisory committee meeting.You can see the full symposium on Johns Hopkins University's YouTube page right now. 1592

TODAY, President @realDonaldTrump is taking ACTION to preserve America's democratic principles and ensure law-abiding American citizens are fairly represented in Congress.https://t.co/fcRgFqQU87— Karoline Leavitt (@KLeavitt45) July 21, 2020 248

There’s a new way to take an Uber and as long as you don’t mind a little walking it’s the cheapest option.Express Pool is the latest option for taking an Uber. Once you plug in your location, the new option will pop up on the bottom far left of your screen.A quick trial test of Express Pool found the service to be a dollar cheaper than Uber Pool. However, you'll have to walk a block or two to be picked up by your driver.The logic behind the new service is to help Uber drivers be able to drive in a straight line to pick up pool passengers. That way, there are no out-of-the-way stops.However, it could mean for a slower pickup time. Also, with any Pool ride from Uber, you will most likely share the ride with other riders.Despite walking out of the way and waiting a bit longer, a test of Express Pool still got riders to their destinations on time.  894

来源：资阳报