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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 St. Louis couple who waved guns at peaceful protesters near their property earlier this year will speak in support of President Donald Trump next week at the Republican National Convention, The Washington Post, NPR and CNN report.The couple will reportedly deliver remarks remotely, as in-person portions of the convention have been canceled.Mark and Patricia McCloskey gained national attention in late June as Black Lives Matter protesters marched toward the home of St. Louis Mayor Lyda Krewson. Krewson and the McCloskeys live in a private, gated community.Though the protesters were peaceful and staying away from the McCloskey's mansion, the couple emerged from their homes with firearms and ordered protesters to leave.Various social media videos show Patricia McCloskey pointing a small handgun at protesters. Mark McCloskey carried a long gun.In July, the couple was charged with unlawful use of a weapon for waving the guns in a "threatening" manner. Both have maintained their innocence, saying they were afraid for their lives and were simply protecting themselves.The White House has previously expressed support for the couple. Press Secretary Kayleigh McEnany said in July that the charges against the McCloskeys were "absurd." Missouri Gov. Mike Parson has also said he's spoken with Trump about the situation.The RNC will take place next week between Aug. 24 and Aug. 27. 1398

A new self-driving shuttle bus got off to a bumpy start in Las Vegas.When the service debuted in the city on Wednesday, one of the driverless vehicles was involved in a collision with a delivery truck, the Las Vegas government said in a statement.During the incident in downtown Las Vegas, the bus automatically stopped to try avoid an accident after its sensors detected the truck, the city said. 405

A Starbucks worker in New Jersey allegedly spat in police officers' drinks, officials said Tuesday.Park Ridge officers arrested Kevin Trejo, 21, on charges of subjecting a law enforcement officer to contact with bodily fluid, knowingly tampering with a cup of coffee while knowing it was ordered by a law enforcement officer and creating a hazardous or physically dangerous condition.In a statement, Park Ridge Police Chief Joseph Madden said Trejo was arrested after an investigation found that he spat in the drinks of officers who patronized the store where he worked.New Jersey State Policemen's Benevolent Association President Patrick Colligan called Trejo's alleged actions "outrageous.""Every time I think we as society hit bottom, there is a new incident," Colligan said. "Officers risk their lives daily, it shouldn't be while getting coffee."A Starbucks spokesperson said Trejo was no longer employed by the company."Obviously this individual's behavior was reprehensible and not at all a reflection of how our partners or employees treat our customers on a daily basis," the spokesperson said.Starbucks is working with the police department in the investigation.WPIX's Aliza Chasan first reported this story. 1228

A tweet by the Girl Scouts congratulating new Supreme Court Justice Amy Coney Barrett drew such outrage from Barrett’s critics that the youth organization swiftly deleted it. That then sparked a new backlash from Barrett’s supporters. The original tweet was posted Wednesday evening. It said, “Congratulations Amy Coney Barrett on becoming the 5th woman appointed to the Supreme Court since its inception in 1789.” The post featured an image of Barrett, who was confirmed Monday and sworn in at the court on Tuesday; along with currently serving justices Elena Kagan and Sonia Sotomayor; former Justice Sandra Day O’Connor; and Barrett’s predecessor, the late Justice Ruth Bader Ginsburg.The post was quickly attacked by critics who view Barrett, a conservative, as a potential threat to civil liberties and women’s rights.“What kind of patch does one earn for uplifting a woman who is the antithesis of justice?” tweeted U.S. Rep. Ayanna Pressley, D-Mass.As the online criticism mounted, the Girl Scouts deleted their original tweet and posted a new statement.“Earlier today, we shared a post highlighting the five women who have been appointed to the Supreme Court. It was quickly viewed as a political and partisan statement which was not our intent and we have removed the post.... Girl Scouts of the USA is a nonpolitical, nonpartisan organization. We are neither red nor blue, but Girl Scout GREEN. We are here to lift up girls and women.”The retreat by the Girl Scouts was quickly assailed by many of Barrett’s conservative supporters.“Of course the @girlscouts caved to the mob and deleted this tweet congratulating Amy Coney Barrett. SAD,” tweeted the Independent Women’s Forum.According to 2018 data, the Girl Scouts had about 1.76 million girls and 780,000 adult members — down from about 2.9 million girls and 900,000 adult volunteers in 2003. 1863