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A military helicopter carrying officials surveying earthquake damage crashed Friday night in the southeastern Mexican state of Oaxaca, killing at least 13 people, Mexican officials said.Twelve people died at the site of the crash in Santiago Jamiltepec, while another person died in the hospital, the state attorney general's office said. Three of the dead were children, the office said. Fifteen others were injured.It is unclear how many of the victims were on the helicopter and how many were on the ground.Mexican Interior Minister Alfonso Navarrete Prida and Oaxaca's governor, Alejandro Murat, were flying near the quake's epicenter to evaluate damage when the helicopter crashed. Both men survived and only suffered "slight concussions," the Interior Ministry tweeted. The 7.2 magnitude earthquake and a magnitude 5.8 aftershock -- both with epicenters in Oaxaca state -- struck the region Friday, the US Geological Survey reported.Mexican President Enrique Pe?a Nieto said the crash took place while the helicopter was landing."Unfortunately, people on the ground lost their lives and others were wounded. My condolences to their families and my wishes for a prompt recovery to those injured," the President tweeted.When addressing the helicopter crash on Twitter, Pe?a Nieto said there were no reports of fatalities directly linked to the quake and aftershock.Efrain de la Cruz, mayor of Santiago Jamiltepec, was on the phone with CNN en Espa?ol's Mario González when the crash occurred."A helicopter carrying the governor and the others went down," he said."A helicopter is down, a helicopter is down. Oh my God! It's a military helicopter," Cruz said. "This can't be possible, oh my God."The-CNN-Wire? & ? 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved. 1803

A missile which brought down Malaysia Airlines Flight 17 in eastern Ukraine nearly four years ago was fired from a launcher belonging to Russia's 53rd anti-aircraft brigade, investigators said Thursday.The Buk missile was fired from a farm near Pervomaisk, the Joint Investigation Team into the MH17 disaster told a news conference in the Netherlands."At the time this area was under control of pro-Russian separatists," said Fred Westerbeke, chief prosecutor of the National Prosecutor's Office of the Netherlands. The Buk launcher of the 9M38 series "was transported from the territory of the Russian Federation and was returned to that territory of the Russian Federation afterwards." 695

A multistate outbreak of listeria has been traced to a Houston manufacturer's Vietnamese ready-to-eat pork products, the US Centers for Disease Control and Prevention announced this week. Long Phung Food Products has issued a recall of its ready-to-eat pork products, which were shipped nationwide.Four people were hospitalized after eating Long Phung anchovy-marinated pork patty rolls manufactured between May 21 and November 16 and labeled with establishment number "EST. 13561." No deaths have been reported.Listeria is the third leading cause of death from food poisoning in the United States, according to the CDC, and is especially dangerous for anyone with a weakened immune system, over age 65 or pregnant. Symptoms usually occur within four weeks of infection but can take as long as 70 days to appear. In some cases, the first signs of infection are diarrhea or other gastrointestinal symptoms. Typical symptoms that follow include headache, stiff neck, fever, muscle pain, confusion, loss of balance and convulsions.Pregnant women are especially at risk. According to the CDC, they are 10 times more likely to get a listeria infection, and the odds are even higher for Hispanic pregnant women, who are 24 times more likely to get listeria.Although pregnant women typically experience only flu-like symptoms, the danger to the developing fetus is high. Infections during pregnancy can lead to miscarriage, premature delivery or stillbirth.Newborns with listeriosis can develop blood infections, meningitis and other serious and potentially life-threatening complications. Listeriosis is treated with antibiotics.The illness has affected people in Texas, Louisiana, Tennessee and Michigan, but the US Department of Agriculture's Food Safety and Inspection Service said it is concerned that families and businesses may have stored frozen products. The full list can be found on its website.The CDC advises consumers and retailers to throw away or return unused products to the place of purchase, even if they have been consumed without any sign of illness. Shelves and drawers where the pork patties were storied should be washed with warm, soapy water and sanitized. 2184

A recent study published Tuesday in the journal JAMA Internal Medicine found that most Americans are still susceptible to COVID-19.According to the study, researchers studied the blood samples of 177,919 Americans across the nation, D.C., and Puerto Rico between July 27 and Sept. 24. They found that fewer than 10% of the people had detectable COVID antibodies."In this U.S. nationwide seroprevalence cross-sectional study, we found that as of September 2020, most persons in the US did not have detectable SARS-CoV-2 antibodies, and seroprevalence estimates varied widely by jurisdiction," the authors concluded. "Continued biweekly testing of sera collected by commercial laboratories will allow for assessment of the changing epidemiology of SARS-CoV-2 in the U.S. in the coming months. Our results reinforce the need for continued public health preventive measures, including the use of face masks and social distancing, to limit the spread of SARS-CoV-2 in the U.S."Researchers noted that Seroprevalence varied between metropolitan/nonmetropolitan areas and across regions, with estimates as high as 23% in the northeast, 13% in the south, and forecasts in the midwest and west were less than 10%.The researchers also found that Seroprevalence was often lowest in older age groups. 1295

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