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A recent study published Wednesday in the New England Journal of Medicine suggests that antibodies might protect people who've already had COVID-19 from being reinfected for at least six months.Researchers looked at 12,541 healthcare workers at Oxford University Hospitals in the United Kingdom and were followed for up to 31 weeks.In the study, researchers investigated the incidences of COVID-19 infection by conducting polymerase chain reaction (PCR) tests on the healthcare workers who had tested positive and negative, including both symptomatic and asymptomatic cases.The study results showed that 11,364 did not have antibody levels, and 1,265 had positive results, which also included 88 healthcare workers in whom seroconversion occurred during follow-up. A total of 223 anti-spike–negative health care workers had a positive PCR test (1.09 per 10,000 days at risk), up to 100 during screening were found to be asymptomatic, and 123 were to have symptoms, the study found.Researchers said that individuals who had anti-spike antibodies had no symptomatic infections. 1083

A self-driving vehicle operated by Waymo was involved in a crash in Chandler on Friday afternoon. Helicopter footage from Scripps station KNXV in Phoenix showed significant damage to the self-driving van, as well as a silver sedan, after the collision near Chandler Village Drive and Chandler Boulevard. Minor injuries were reported in the crash.Chandler police said the Waymo van was in autonomous mode with an occupant behind the wheel at the time of the crash, but was not the "violator vehicle."Police spokesman Seth Tyler said it is believed that this is the first Waymo collision in Chandler this year.RELATED: Waymo gives?360-degree?view of what it's like inside self-driving carsThis is the second known self-driving car crash in the Phoenix area in the past two months. An Uber self-driving vehicle hit and killed a?pedestrian in Tempe on March 19.After the March crash, Waymo CEO John Krafcik?said he was confident in his company's technology.In November 2017, Waymo?announced that self-driving cars would be tested in Chandler without someone in the driver's seat. Chandler police told KNXV that an operator was behind the wheel at the time of Friday's collision. KNXV has reached out to Waymo for a comment on the crash.Waymo is subsidiary of Google. The company was founded in 2009.  1359

A Southwest Airlines flight with 117 people aboard slid off a runway on Thursday at California's Hollywood Burbank Airport during heavy rain, the Federal Aviation Administration said.There were no injuries reported, FAA spokesman Ian Gregor said.Flight 278, a Boeing 737-700 that originated in Oakland, California, came to a stop after running through an area of crushable material designed to bring an airplane to a halt, he said.The airport is open, and all airlines are operational, the airport tweeted. One runway has been closed.There were 112 passengers and five crew members on the flight, Southwest spokeswoman Brandy King said. Southwest tweeted the airline will refund the passengers ticket costs and will make an "additional gesture of goodwill."Around the time of the incident, visibility at the airport dropped to 1 mile. The area is experiencing heavy rain -- up to a half inch in an hour at one point, and a flood advisory is in effect for Los Angeles County, where the airport is located.The FAA implemented a ground stop that kept incoming flights in the air for an extra 45 minutes.Over six hours, the area received 1.66 inches of rain. Its monthly average is 2.4 inches.The-CNN-Wire 1209

A study released earlier this year conducted by university researchers from both the UK and US indicated that climate change is causing more extreme rainfall events from hurricanes, specifically among Caribbean islands.The study was authored by researchers from Bristol University in the UK and MIT in the US.The researchers said that the focus on the study was on extreme rainfall from hurricanes, like Hurricane Dorian which, stalled over the Bahamas last year.“Overall, the results suggest that the Eastern Caribbean region in particular (Puerto Rico and the Dominican Republic) is likely to benefit from a reduction in extreme hurricane precipitation events resulting from increased efforts to stabilize global warming,” the study reads, pointing to the Paris Climate Accord as a benchmark for minimizing the impact of extreme rainfall events from hurricanes.The research found that events like Hurricane Maria, which struck Puerto Rico in 2017, would happen twice as frequently if sea surface temperatures increase by 2 Celsius instead of 1.5 Celsius, which is the goal of the Paris Climate Accord.In the case of Hurricane Dorian, an event like that could strike the Bahamas four to five times more frequently if sea surface temperatures increase by 2 Celsius instead of 1.5 degrees. A seemingly small difference could be what saves thousands of lives and billions of dollars in damage.One of the study’s authors told CBS News there is particular concern that the impact of extreme rainfall events could occur over poorer island nations in the Caribbean."The findings are alarming and illustrate the urgent need to tackle global warming to reduce the likelihood of extreme rainfall events and their catastrophic consequences, particularly for poorer countries which take many years to recover," Emily Vosper, a researcher at the University of Bristol, told CBS News.The full study is available here. 1912

A mysterious metal object has shown up along a northern San Luis Obispo County hiking trail.The monolith on Atascadero’s Pine Mountain has three sides and is 12-feet tall, according to City officials.While when the object was placed there or by who hasn't been revealed, locals say it was a recent addition.Pine Mountain is part of the Atascadero Land Preservation Society (ALPS), which says it doesn't have information on the monolith. Monolith structures are on the minds of many after the discovery of one in Utah last month. It was later removed by an unknown party. 578

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