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A recent study by the U.S. Centers for Disease Control and Prevention found that 6% of more than 3,000 health care workers who were tested had antibodies to coronavirus. Still, after being retested 60 days later, 28% of them had antibody levels so low they were no longer detected."These results suggest that serology testing at a single time point is likely to underestimate the number of persons with previous SARS-CoV-2 infection, and a negative serologic test result might not reliably exclude prior infection," the authors of the study said.According to the CDC, blood samples were taken from 3,248 frontline health care personnel at 13 hospitals between April 3- June 19, 2020.194 of those healthcare workers had detectable antibodies to COVID, the agency said.Participants with higher initial antibody responses were more likely to have antibodies detected at the follow-up test than were those who had a lower initial antibody response, the study concluded.The authors added that the study shows that the window is limited for collecting potentially useful "convalescent plasma" from the blood of patients who have fought off COVID-19. 1151

A teacher in Kansas who just wanted to keep track of schools closing this fall because of COVID-19 cases, has created a nationwide database to help parents and educators.Alisha Morris teaches in Kansas’ Olathe School District and as she prepared for this fall, began looking into how other districts and schools were handling the first few weeks of class.“I was seeing a lot of articles about schools that were opening up and issues already happening on Day 1,” Morris, 29, said. “I thought, 'Wow!' Maybe these are a lot of repeat articles, and I’m just seeing the same thing over and over. Surely, there can’t be that many already,’” Morris told MyCentralJersey.com.She started keeping track of articles and COVID-19 cases and closures at schools in a Google spreadsheet. She shared it with colleagues and friends, then with her school district’s board of education.“The response I received was astronomical,” Morris said.As word spread about the database, more submissions came in. There are more than 700 entries for more than 40 states. Morris has set up a way for people to submit cases and school closures through her spreadsheet.Morris hopes to transition to a new system soon, with help from volunteers.“When I first created this spreadsheet, I had no idea that it was going to become such a big thing. I realize the Google sheet is clunky right now, but rest assured that I'm working to get it transferred to a professional interface,” Morris posted on her spreadsheet. 1486

A Saudi mission that resulted in the apparent death of journalist Jamal Khashoggi in Istanbul was organized by a high-ranking officer with the General Intelligence Presidency, Saudi Arabia's main intelligence service, three sources familiar with the case told CNN.One of those sources described the officer as close to the inner circle of Crown Prince Mohammed bin Salman. It is unclear whether the crown prince authorized an interrogation, abduction or killing. Several officials CNN spoke with said the mission could not have happened without the direct knowledge of the 33-year-old crown prince, the kingdom's de facto ruler, who is known by his initials "MBS."A second source said the officer assembled and sent his own team to interrogate Khashoggi. They suspected Khashoggi of having ties to the kingdom's arch rival, Qatar, the source said. There has been no evidence to substantiate Khashoggi had such ties.Another source told CNN the mission's organizer was not transparent about what he told Riyadh, which, the source said, explained why the government had no clear information for days. 1105

A new wave of pollution is littering our streets and shores, disposable face masks and plastic gloves.The use of personal protective equipment (PPE) has surged around the world, with one study estimating a monthly usage of 129 billion face masks and 65 billion gloves globally."The amount of PPE we're finding, even just anecdotally walking through our streets, is astounding," said Alex Ferron, Chapter Chair of the San Diego Surfrider Foundation.Making matters worse, the pandemic has impacted some of the traditional methods used to tackle pollution.Last year, Surfrider San Diego's beach clean-ups removed more than 16,000 pounds of trash from the coastline. But with social distancing laws, the nonprofit fears that number will be drastically lower in 2020."Plastic pollution hasn't stopped. Plastic is being used, if not more than ever," said Ferron. The French nonprofit Ope?ration Mer Propre is documenting PPE waste in the Mediterranean Sea, sharing videos and pictures of gloves and face coverings littering the seafloor.Ferron says the pandemic also reversed other progress made by environmental groups."Initially, we saw a big trend away from reusable items at all, my coffee shop wouldn't take my mug, my grocery store wouldn't take my bag."Ferron says she was OK with this safety precaution early on because little was known about the virus.But now, she points to some of the latest CDC information, which says COVID is mainly spread from person-to-person, within close contact. Transmission through contaminated surfaces has not been documented.A health expert statement signed by over 100 scientists around the world stated that reusable systems could be used safely by employing basic hygiene.To try and tackle the problem, Surfrider San Diego launched a solo cleanup campaign, encouraging individuals to clean old and new waste polluting our communities."Empower people to go out and pick up trash. In their neighborhood, in their parks, at their local beach, wherever they feel comfortable, and do their part," said Ferron. The nonprofit has guidelines on how to do this safely, urging people to wear a mask, use reusable gloves, and a trash grabber if possible. Also, they say to bring two bags to separate PPE from recyclables.Those who can't get out and clean can do their part by making sure their PPE ends up in a trash can and not the ground.Ferron says whether or not you live near a beach, you can make a difference."It's not just an ocean issue, it's an environment issue," Ferron said. 2522

A new study from Canada's Ottawa Hospital Research Institute found that marijuana use during pregnancy makes it 1.5 times more likely the child will develop autism.The findings will be published in journal Nature on Monday.The study followed 500,000 women and children between 2007 and 2012.In 2,200 cases, mothers said they used marijuana while pregnant, and never did other drugs, tobacco, or alcohol.The study found "an association between maternal cannabis use in pregnancy and the incidence of autism spectrum disorder in the offspring.""The incidence of autism spectrum disorder diagnosis was 4.00 per 1,000 person-years among children with exposure compared to 2.42 among unexposed children, and the fully adjusted hazard ratio was 1.51," the study showed. 771