山西知名痔疮医院(山西喝酒后便血) (今日更新中)

Decades of underinvestment has left tens of thousands of schools across the country with inadequate ventilation systems, a problem that is now front and center in the debate to reopen schools during the pandemic.Nationally, 90 percent of schools fail to meet minimum ventilation standards. It’s an issue Dr. Joseph Allen has been sounding the alarm about since COVID-19 first shut down schools earlier this year.“We’ve chronically underinvested in our schools’ buildings,” said Dr. Allen who serves as the director of the Healthy Buildings program at the Harvard Chan School of Public Health.Dr. Allen and his colleagues have spent months analyzing school buildings, and back in June, they released a detailed 60-page report that school districts could follow in order to safely bring kids back into the classroom.In order to keep COVID-19 from spreading in schools, two things have to happen: everyone in the buildings must be wearing masks and school districts need to ensure buildings have proper ventilation, the report found.“If air is being recirculated and not filtered, all of that air that’s coming from one space and going to another could be potentially contaminated and spread the virus,” Dr. Allen said.But replacing decades-old ventilation systems that may not work properly is expensive and time-consuming. Because of that, Dr. Allen is recommending school districts also consider portable air cleaners for classrooms.Through his research, Dr. Allen found that if you can change the air in a classroom five times per hour, it cleans the air in that space every 12 minutes. However, the air cleaners must be equipped with a HEPPA filter in order to be effective.Even something as simple as opening windows could reduce the transmission of the virus.“If you look at the cases of spread in school right now, they all share common traits; it’s no mask-wearing and low to no ventilation. When we do that, we can guarantee there will be more cases,” he explained.Last week, the Healthy Buildings program also released a detailed portable air cleaner calculator. The tool allows school administrators to input the size of the classroom, even ceiling height, and then determine the kind of air cleaner that would most effectively keep COVID-19 from spreading.“It is critically important that we get kids back into in-person learning and we haven’t treated it as this national priority that it needs to be,” Dr. Allen added. 2438

DENVER, Colorado — The deadliest wildfire in California's history has left behind a path of unimaginable destruction, wiping out homes and killing at least 50 people. The Hamilton family had nine minutes to evacuate and barely escaped as flames raced toward their home. They lost everything in the fire just three weeks after moving all their belongings to Paradise, California.Steve Hamilton, his wife Delinda and their three kids moved from Colorado to California so he could take a job as a lead pastor. The family spent six years in Colorado where he worked for the Rocky Mountain Conference of Seventh-day Adventists."I know it was a really hard decision for him to leave but he felt like God was calling him out there," said Matt Moreland, a longtime friend and former coworker.Boxes were still packed when the fire destroyed the home where they had recently moved in. Pictures show the outline of a foundation and some of their belongings in the debris."They really just jumped in the car and drove away and Steve said when they were driving away their front yard was already on fire," said Moreland.He say the family didn't have insurance yet because they had just moved. Despite their loss, the family is focusing on helping others in their new community. "As soon as they went down the hill in Chico, Steve was calling people, asking for supplies to get things organized in order to start helping these people," said Moreland.Now friends are trying to help the family start over. They started a GoFundMe page to raise money for them as they continue their ministry work in California."They would never ask for help, they would just be the ones helping everyone else," said Lindsey Pratt, a friend who started the fundraising page. 1783

Data shows the number of prison inmates testing positive for the coronavirus soared well past the 50,000 mark this week. The increase is a sign that recent outbreaks are threatening to undo control measures put in place earlier in the pandemic. At the end of June, the total number of coronavirus cases among prisoners had reached at least 52,649, an increase of 8% from the week before. That's according to data compiled by the Marshall Project, a nonprofit news organization focusing on criminal justice, and The Associated Press. Of those, at least 35,796 have recovered, and at least 616 inmates have died. 618

DENVER – Denver business owners have until the end of the month to make sure they’re complying with changes to the city’s building code in regard to gendered language on restroom signs.The Denver City Council voted in December 2016 to amend the code to state that any single-occupant restroom – a restroom with a single stall or toilet or a stall and urinal that’s intended for use by one person at a time – must have a sign stating that it’s open for use by anyone regardless of gender.Existing businesses have until April 30 to meet that requirement.The change also applies to “family” or assisted-use restrooms.Many of these bathrooms are likely already gender neutral; the change in the building code simply states that they must be labeled as such. The change also requires that the restrooms lock from the inside.The city doesn’t require any specific wording or a particular sign design, but the sign must make it clear that the restroom is gender-neutral.According to the city’s website, businesses that don’t have the proper signs will receive a notice that they have 30 days to comply. After that, the city may “seek any appropriate remedy allowed by the Denver Building and Fire Code.”Read more about the new requirements here. 1245

DALLAS (AP) — A Texas prosecutor said Friday that investigators have linked more than 60 killings in at least 14 states to a 79-year-old California inmate who may be the most prolific serial killer in U.S. history.Ector County District Attorney Bobby Bland said Samuel Little continues to cooperate with investigators from around the country who interrogate him in prison about cold case killings dating back to the 1970s. Among those who spoke to him were investigators from Ohio, where Little grew up and where he's suspected of killing at least five women.Little was convicted of killing three Los Angeles-area women and pleaded guilty to killing a Texas woman, and he's serving life sentences in California. Little, who lived a nomadic lifestyle, claims to have killed 93 women as he crisscrossed the country over the years.Bland said Little is in failing health and has exhausted his appeals, leading him to be forthcoming with investigators."At this point in his life I think he's determined to make sure that his victims are found," he said.During Little's 2014 trial in Los Angeles, prosecutors said he was likely responsible for at least 40 killings since 1980. Authorities at the time were looking for possible links to deaths in Florida, Georgia, Kentucky, Louisiana, Mississippi, Missouri, Ohio and Texas.But Little was not forthcoming with information at the time and Bland credits Texas Ranger James Holland with gaining Little's trust and eventually eliciting a series of confessions.Holland traveled to California last year to speak with Little about cold cases in Texas. That led Little to be extradited to Texas and his guilty plea in December in the 1994 strangulation death of Denise Christie Brothers in the West Texas city of Odessa. But Holland's conversations with Little have continued, even after Little was returned to California to serve his sentences, and it was Holland who determined that he was responsible for 93 deaths, said Bland, who received an update from Holland this week.Information provided to Holland was relayed to law enforcement agencies in several states, leading to a revolving door of investigators who traveled to California to corroborate decades-old deaths.Among them were investigators from Ohio, where prosecutors on Friday announced charges against Little in the 1981 killing of a Cincinnati woman and where he was charged last week in the deaths of two women in Cleveland. He previously was charged in a second Cincinnati killing and confessed to another one in Cleveland, though investigators are still trying to identify the victim in that case.He explained that Little's victims often were suffocated or strangled, in many cases leaving few physical marks and leading investigators to determine the women died of overdoses or of natural causes."There's still been no false information given," Bland said. "Nothing has been proven to be false."Gary Ridgway, the so-called Green River Killer, pleaded guilty to killing 49 women and girls, making him the most prolific serial killer in U.S. history in terms of confirmed victims, though he said he killed 71. 3122

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