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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 relaxing swim in the ocean after a day of training suddenly changed when a shark got close to a coast guard group, prompting crewmembers to fire shots in the water to scare the animal away.Members of the Coast Guard Cutter Kimball had completed operations for the day “a zillion miles from land” and “had not been off the ship for weeks,” they said in a Facebook post describing the encounter. USCGC Kimball is based in Honolulu.The group decided to go for a swim complete with an inflatable unicorn, and utilized a “fully vetted and tested plan we’ve used before” which included safety briefs, a small boat stationed 50 yards out and “an armed shark watch.”Then, over the radio, a call comes over “shark!” 716

A reminder: snakes, or other live animals, should not be used as face coverings during the pandemic. The warning is courtesy transportation officials in the United Kingdom after a man was seen this week riding a public bus with a large snake wrapped around his head. 274

A University of Utah track athlete was shot dead on the campus Monday night by a man she reportedly had dated and complained to police about, authorities said.University police found Lauren McCluskey's body in the back seat of a car on campus after her worried mother called police, according to university Police Chief Dale Brophy. McCluskey, 21, apparently had a dispute with the man, identified as Melvin Rowland, 37, university Police Lt. Brian Wahlin said.The shooting led police to lock down the campus for hours while they searched for the suspect. Brophy said someone picked the suspect up from campus after the shooting.Early Tuesday, Salt Lake City Police saw Rowland in downtown Salt Lake City and briefly chased him, Brophy said. Brown said Rowland slipped in to the back door of a church, where he was later found dead from a self-inflicted gunshot."This isn't right," Mark Harlan, the school's athletic director, said Tuesday of the death of McCluskey, a Pullman, Washington, native. 1005

A pair of children, ages 1 and 3, were shot inside of a car Thursday evening outside the University Of Mississippi Medical Center in Jackson, the Jackson Police Chief told the Clarion-Ledger reported. The shooting briefly prompted fears of an active shooter on the university's campus, causing a heavy police response. The Clarion-Ledger reported that one child was shot in the leg, and the other in the torso. Their conditions have not been publicly released. Following the shooting, a female driver transported the children to the hospital. The suspect was still on the loose as of Thursday evening.  655