[ti:Survivor Plasma Studied to Possibly Prevent Coronavirus Infection] [by:pzw8555.cn] [00:00.00]更多听力请访问pzw8555.cn [00:00.04]Researchers are launching a study to see whether blood plasma [00:06.08]from coronavirus survivors can block infection in others. [00:13.80]The study will involve people in groups at high risk of getting infected. [00:21.48]This could include health workers, husbands or wives of sick individuals [00:28.44]and people who live in nursing homes. [00:33.24]The new research will build on recent studies [00:37.24]that looked into whether blood plasma from recovered coronavirus patients [00:44.00]could be an effective treatment for infected individuals. [00:50.28]Plasma is the yellowish, liquid part of blood. [00:55.48]It contains proteins called antibodies that target infections entering the body. [01:04.24]Blood plasma from former patients may help infected individuals [01:10.32]defeat COVID-19, the disease caused by the coronavirus. [01:18.08]Many survivors of COVID-19 have donated their blood plasma [01:24.48]in hopes of helping sick patients recover. [01:29.60]Thousands of coronavirus patients in hospitals around the world [01:35.00]have been treated with this kind of plasma, [01:38.60]including more than 20,000 in the United States. [01:44.72]So far, there is little evidence to demonstrate [01:48.64]that blood plasma is helping coronavirus patients recover. [01:54.68]One recent study from China had unclear results. [02:01.40]Another from New York showed only small benefits. [02:07.56]Dr. Shmuel Shoham of America's Johns Hopkins University told The Associated Press [02:15.52]that the studies do provide some "glimmers of hope." [02:21.72]Shoham will lead the new study on whether the plasma can prevent infections entirely. [02:30.64]Researchers plan to use 150 volunteers for the study. [02:37.72]Some of the test subjects will receive plasma from COVID-19 survivors [02:44.52]that contains coronavirus-fighting antibodies. [02:49.32]Others will receive a kind of plasma used daily in hospitals. [02:57.16]Scientists will examine whether there are differences in who gets sick. [03:04.56]If the survivor plasma works, it could play a major part [03:10.12]in reducing the number of coronavirus infections until a vaccine is approved. [03:17.92]The researchers say the survivor plasma could be given [03:23.24]to high-risk individuals to temporarily strengthen the immune system. [03:31.24]"They're a paramedic, they're a police officer, they're a poultry industry worker, [03:38.08]they're a submarine naval officer," Shoham said. [03:43.04]"Can we blanket protect them?" [03:47.00]As more people survive COVID-19, there are increasing calls for them [03:53.72]to donate plasma to build up the nation's supply, [03:58.44]in case the treatments prove to be effective. [04:04.24]Donated blood plasma is also sometimes [04:08.48]combined with products designed to make the plasma stronger. [04:15.04]The Spanish chemical company Grifols [04:18.44]is expected to create a version of donor plasma [04:23.24]that is filled with a large amount of antibodies. [04:28.92]Using blood plasma directly from recovered patients seems to be safe, [04:35.96]Dr. Michael Joyner of the Mayo Clinic reported last month. [04:42.92]His team followed the first 5,000 people to receive plasma [04:48.88]in a program run by the U.S. Food and Drug Administration. [04:55.24]The program, which helps hospitals carry out the experimental treatment, [05:01.20]found few serious side effects in patients. [05:07.08]I'm Bryan Lynn. [05:09.00]更多听力请访问pzw8555.cn