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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 report prepared for the Senate Intelligence Committee said Russian social media efforts to meddle in the 2016 presidential election included messaging in support of the Green Party 2016 presidential nominee Jill Stein.CNN obtained the report, prepared by New Knowledge, which said the Russian government-linked Internet Research Agency -- a well-known troll farm -- utilized all major social media platforms, and its efforts online included messaging in support of Stein's third party presidential effort.CNN has reached out to Stein for comment on the report.The mentions of Stein online came alongside related and disparate messages noted throughout the report, which said the Internet Research Agency's themes ranged from support for Vermont independent Sen. Bernie Sanders and the Black Lives Matter movement to the Tea Party and gun rights.A summation of the report's findings on "comprehensive anti-Hillary Clinton operations" said while the group's assumed Twitter personas had some pro-Clinton content, "the developed Left-wing Twitter personas were still largely anti-Clinton and expressed pro-Bernie Sanders and pro-Jill Stein sentiments."Likewise, the report said "pro-Bernie Sanders and Jill Stein content" were among the group's go-to themes across other platforms.The report's assertion about support for Stein echoed similar accounts in the past about Russian influence online. An indictment of Russian nationals earlier this year from special counsel Robert Mueller said the online effort included encouraging "minority groups not to vote in the 2016 US presidential election or to vote for a third-party US presidential candidate."Throughout her presidential bid, Stein called for a conciliatory approach with Russia, and she has compared Russian interference in the 2016 election with US efforts around the globe.Earlier this year, Stein told CNN she objected to turning over some documents to the Senate Intelligence Committee. She said at the time the requests were overly broad and unjustified."Legitimate concerns about interference in our election should not be twisted into a campaign of censorship, war-mongering and political intimidation against opposition to the bipartisan establishment," Stein said.CNN previously identified at least one occasion when the Russian group targeted Green Party activists.In the days after the shooting of Philando Castile in July 2016, the Russian group used a fake Black Lives Matter page called "Don't Shoot Us" in an attempt to organize a protest against the police.Brandon Long, the state party chairman of the Green Party of Minnesota, remembers hearing about the planned "Don't Shoot Us 'event. He told CNN, "We frequently support Black Lives Matter protests and demonstrations and we know pretty much all the organizers in town and that page wasn't recognized by anyone." CNN later reported "Don't Shoot Us" was run from Russia. 2905

A video of a woman who was allegedly resisting arrest while being beaten by police officers on a New Jersey beach on Saturday has been shared 1,000s of times since being published. Emily Weinman, a resident of Philadelphia, claimed that officers questioned her about underage drinking while she was on a beach in Wildwood, New Jersey. Weinman claimed that she was given an alcohol breath test, which came back negative. Weinman added in a Facebook post that the officers from the Wildwood, New Jersey Police were going to let her go, but when she asked officers why they were enforcing underage drinking rather than more serious crimes, that is when the officers had a change of heart. Weinman said that officers asked for her to identify herself, which she refused to do. Weinman claims an officer said, "I was gonna let you go but now I'll write you up." 894

A pair of major Disney-released blockbusters, "Black Panther" and the upcoming "Mary Poppins Returns," join "A Star is Born" and a mix of smaller movies in the American Film Institute's annual roster of the most outstanding achievements in film and television.The juried awards, voted on by industry executives and producers, journalists and academics, also recognized "BlacKkKlansman," "Eighth Grade," "If Beale Street Could Talk," "The Favourite," "First Reformed," "Green Book" and another box-office hit, "A Quiet Place," in the film category.Although left off the 10-best list, Netflix's "Roma," the Spanish-language entry from director Alfonso Cuarón, was chosen to receive a special award as "a work of excellence outside the Institute's criteria for American film." To be eligible, movies must have "significant creative and/or production elements from the United States."On the television side, a separate jury recognized four series from the FX network: "The Americans," "Atlanta," and two shows from producer Ryan Murphy, "The Assassination of Gianni Versace: American Crime Story" and "Pose."Other honorees were spread among various players, including HBO's "Barry" and "Succession," Netflix's "The Kominsky Method," Amazon's "The Marvelous Mrs. Maisel," and AMC's "Better Call Saul." NBC's hit drama "This is Us" was the lone broadcast program to grace the list, while the most glaring oversights would be the past two Emmy winners for best drama, "Game of Thrones" and "The Handmaid's Tale."The AFI will honor the winners at a luncheon event in January. 1575

A tourist was stabbed while playing slots Monday at the Golden Nugget in downtown Las Vegas.It happened shortly after 1 a.m. A man, who was visiting from another country with his brother, was approached by another man who asked him for a cigarette.The man then stabbed the tourist in his side with warning or provocation.The victim's brother chased the suspect but was unable to catch him.The suspect was later spotted by security guards at Four Queens. They called 911. A patrol unit then spotted the suspect near Fremont Street and Maryland Parkway and arrested him.The victim was transported to a local hospital and expected to be discharged later today, according to Watch Commander Lt. David Gordon.  718