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COVID-19 Reinfections thread-South Korea says no reinfections?-Vietnam, China, Brunei, India..,

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  • #16
    https://www.telegraph.co.uk/news/202...ndation-widget

    UK coronavirus antibody test validated – but results show under-40s may not be immune


    Younger people who had tested positive for virus came back negative, suggesting test may not be useful for wider population
    ....
    Tests aimed at determining whether Britons have recovered from coronavirus may not be useful because younger people do not produce sufficient quantities of antibodies to the virus, early research suggests.

    It was hoped that antibody tests could help kickstart the economy by allowing those who are immune out of lockdown.
    ...snip
    "The only security we have is our ability to adapt."

    Comment


    • #17
      Why are some South Koreans who recovered from the coronavirus testing positive again?

      SANGMI CHA
      SEOUL
      REUTERS
      PUBLISHED 9 MINUTES AGO
      UPDATED APRIL 16, 2020


      KIM DO-HOON/THE ASSOCIATED PRESS

      South Korean health officials are investigating several possible explanations for a small but growing number of recovered coronavirus patients who later test positive for the virus again.

      Among the main possibilities are re-infection, a relapse, or inconsistent tests, experts say.

      South Korea had reported 141 such cases as of Thursday, according to the Korea Centers for Disease Control and Prevention (KCDC).

      RE-INFECTION OR RELAPSE?


      Although re-infection would be t...https://www.theglobeandmail.com/worl...virus-testing/
      CSI:WORLD http://swineflumagazine.blogspot.com/

      treyfish2004@yahoo.com

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      • #18
        What S. Korea knows so far about recurring COVID-19 cases

        By Ock Hyun-ju
        Published : Apr 17, 2020 - 17:24 Updated : Apr 17, 2020 - 17:33

        A total of 163 patients previously declared cured of COVID-19 have tested positive again in South Korea as of Friday, up 22 from a day earlier, giving the government a fresh headache in its fight against the virus.

        The recurring cases account for 2.1 percent of the 7,829 people released from quarantine after recovering. Studies are underway to find out why, according to the Korea Centers for Disease Control and Prevention.

        It took 13.5 days on average for these patients to test positive again after being deemed clear of COVID-19 -- as little as one day and as long as 35.
        ...

        An epidemiological and clinical analysis of 137 recurring cases showed that more than half of them, 72 people, had no symptoms and 61 people showed mild symptoms, according to the KCDC. Analysis is underway for the other four.

        Those who test positive again after release from quarantine are usually detected through regular testing required by some municipalities or when they show symptoms and seek testing themselves.

        Health officials here have cautiously dismissed the possibility of patients being reinfected with the virus.

        ....

        “We could not find the virus that was alive (in recovered patients who tested positive again), so we think it will not be highly infectious,” KCDC Director General Jeong Eun-kyeong said at a briefing Friday.

        “In the cases testing positive again within one week after full recovery, many of them produce negative and positive results alternately before eventually producing positive results due to remaining pieces of the virus in the body,” she said.


        As of Friday, there were no cases of secondary transmission from recovered patients who had tested positive again, according to the KCDC.
        Some 294 people came into contact with the patients who tested positive again, with 256 of them under government monitoring.

        While 22 recovered patients were back in self-quarantine after testing positive again on Friday, Korea saw 22 new infections. The total number of COVID-19 cases here stands at 10,635.

        The number of recurring cases has more than tripled from 51 on April 6, keeping the authorities on their toes despite the country largely having brought the virus situation under control, with fewer than 30 new cases per day for the past week.

        There were no such recurring cases of severe acute respiratory syndrome or Middle East respiratory syndrome, the authorities said a day earlier, calling the novel coronavirus “evil.”...
        http://www.koreaherald.com/view.php?ud=20200417000631

        CSI:WORLD http://swineflumagazine.blogspot.com/

        treyfish2004@yahoo.com

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        • #19
          COVID-19 In South Korea Appears To Have 'Reactivated' In Some Patients

          By Cathy Burke | Friday, 17 April 2020 10:03 PM

          More than 160 South Koreans have tested positive a second time for the coronavirus, suggesting COVID-19 may have a longer shelf life than expected, the Wall Street Journal reported.

          The virus has “reactivated” in the patients, meaning it went dormant and came back,...But the research remains ongoing and inconclusive, the Journal reported.

          ...
          “It may be that you have to test these recovered people every month for symptoms or viruses,” Mary Guinan, a former chief scientific adviser to the U.S. Centers for Disease Control and Prevention director, told the Journal. “Maybe it comes and goes. We don’t know.”

          The World Health Organization has acknowledged not all recovered patients appear to have the antibodies to stave off a second infection, the Journal reported.

          “Countries in Europe and the U.S. will see the same phenomena after us, and they will look to South Korea’s ongoing research for clues,” Lee Hyuk-min, an infectious-disease doctor in Seoul, who advises the government on COVID-19 response, told the Journal...https://www.newsmax.com/world/global.../17/id/963490/
          CSI:WORLD http://swineflumagazine.blogspot.com/

          treyfish2004@yahoo.com

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          • #20
            Is COVID-19 ‘reinfection’ possible? What a study on monkeys shows
            Researchers found that 5 days post-reinfection (dpr), the re-exposed monkeys (Rhesus monkey Macaca mulatta) tested negative.

            Chimps 're-challenged' with virus after recovery shows role of immunity
            Published: April 18, 2020 14:18Jay Hilotin, ASsistant Editor

            ....Now, however, there had been concerns raised over reported COVID-19 “reinfections”. On February 28, 2020, Reuters reported that a number of discharged patients in China and elsewhere are testing positive after "recovering".
            ....
            Here’s a lowdown on the reported reinfection story:

            Q: What triggered such reinfection concerns?


            Following unspecified reports of "reinfection", on April 11, 2020 (Saturday), the World Health Organization (WHO) said that it was looking into reports of some COVID-19 patients testing positive again — after initially testing negative for the disease while being considered for discharge.
            Q: What’s prompted reports of “reinfection”?



            Beside the February reports in China, on April 10 (Friday), South Korean officials also reported 91 patients thought cleared of COVID-19 had “tested positive again”. Korean health officials said, however, that they are trying to find out if this is the case.
            Q: What accounts for the supposed “reinfections”, as in the 91 reported cases in South Korea?


            Experts said it’s possible it was a relapse, instead of a reinfection, as some SARS-CoV-2 tests are not rigorous enough, that they could yield “false negative” results for the virus.

            The discovery of immunity in monkeys 28 days following the primary infection sheds some light on puzzling cases in which patients appeared to relapse, or be re-infected. Some discharged after testing negative for coronavirus later again developed symptoms, even testing positive.

            Jeong Eun-kyeong, director of the Korea Centers for Disease Control and Prevention, told a briefing that the virus may have been “reactivate
            d....https://gulfnews.com/world/is-covid-....1587206610162
            CSI:WORLD http://swineflumagazine.blogspot.com/

            treyfish2004@yahoo.com

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            • #21

              'No evidence' antibodies give coronavirus survivors immunity, according to WHO


              WHO health experts say "nobody is sure" if humans with coronavirus antibodies could be reinfected.

              John Moore/Getty Images
              PAUL SACCA

              The World Health Organization issued a warning that there is currently no evidence that people who recovered from the coronavirus and have antibodies in their blood plasma will be immune to the deadly virus, which suggests that people who have contracted the disease once might not be immune from being reinfected by the virus.


              The WHO cautioned that serological tests, which look for the presence of antibodies in blood plasma, might not be as helpful in identifying immunity because there is no proof that humans can build up immunity to prevent being reinfected by COVID-19.

              During a Friday news conference in Geneva, Dr. Maria van Kerkhove
              said, "There are a lot of countries that are suggesting using rapid diagnostic serological tests to be able to capture what they think will be a measure of immunity. Right now, we have no evidence that the use of a serological test can show that an individual has immunity or is protected from reinfection.
              "





              "These antibody tests will be able to measure that level of seroprevalence - that level of antibodies - but that does not mean that somebody with antibodies means that they are immune," said van Kerkhove, head of WHO's emerging diseases and zoonosis unit.

              "What the use of these tests will do will measure the level of antibodies," van Kerkhove said. "It's a response that the body has a week or two later after they've been infected with this virus."

              Dr. Mike Ryan, executive director of WHO's emergencies program, noted that "nobody is sure" if humans with coronavirus antibodies could be reinfected.

              "Nobody is sure whether someone with antibodies is fully protected against having the disease or being exposed again," Ryan said on Monday. "Plus some of the tests have issues with sensitivity. They may give a false negative result."

              "With regards to recovery and then reinfection, I believe we do not have the answers to that. That is an unknown," Ryan said. "One would expect that a person who generates a full-blown immune response with detectable antibodies should have protection for a period of time. We just don't know what that period of time is."

              Van Kerkhove referenced a preliminary study of the blood plasma of 175 patients in Shanghai who had recovered from the coronavirus.

              "And that found some individuals had a strong antibody response," van Kerkhove stated. "Whether that antibody response actually means immunity is a separate question. That's something that we really need to better understand is what does that antibody response look like in terms of immunity."


              The Centers for Disease Control and Prevention rolled out a plan to do serologic testing in "more areas with high numbers of people with diagnosed infections." But the CDC also warned that "serologic test results have limitations that make them less than ideal tools for diagnosing people who are sick." The tests are "limited" because "it typically takes one to two weeks after someone becomes sick with COVID-19 for their body to make antibodies; some people may take longer to develop antibodies."

              Professor John Newton, Director of Health Improvement at Public Health England, said the public should not use any unproven antibody tests.


              "We are breaking new ground with this work every day, and I am confident this major research effort will make a breakthrough," Newton said. "Until then, please don't buy or take any unproven tests. They may not be reliable for your intended use; they may give a false reading and put you, your family or others at risk."

              Over 582,000 people of the more than 2.2 million confirmed COVID-19 cases worldwide have recovered.....

              https://www.theblaze.com/news/corona...s-immunity-who

              CSI:WORLD http://swineflumagazine.blogspot.com/

              treyfish2004@yahoo.com

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              • #22
                Corona 19 Wanyang Namyangju 40-year-old man reaffirms after four days of discharge

                2020-04-18 15:52

                Change font size share comment
                (Namyangju = Yonhap News) Reporter Kim Do-yoon = Namyangju, Gyeonggi Province announced that a 40-year-old man who had been cured after suffering from a new coronavirus infection (Corona19) was reconfirmed on the 18th.It has been four days since I was discharged from the hospital.
                The man, who lives in Byeolnae-dong, was previously confirmed as Corona 19 on the 20th of last month, was treated at the Pocheon Hospital of Gyeonggi-do Medical Center and the Yongin Life Therapy Center, and was discharged on the 14th to go home.Both tests were negative before discharge....
                https://m.yna.co.kr/view/AKR20200418...news03_related

                CSI:WORLD http://swineflumagazine.blogspot.com/

                treyfish2004@yahoo.com

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                • #23
                  .....Of the 163 relapse cases, 109 were women. Daegu, the country's worst virus-hit region, reported the most relapse cases with 67, followed by the surrounding North Gyeongsang Province with 54.

                  By age group, 38 relapse cases were reported among those in their 20s, followed by people in their 50s with 32 cases.

                  The KCDC said it took 13.5 days on average for people to be retested positive for COVID-19 after being released from quarantine.

                  Of the 137 cases that have clinical and epidemiological information, 61 showed symptoms again, the KCDC said.


                  No secondary infections have been reported from relapse cases, according to the KCDC. Of the 294 people who had contact with those who retested positive for the new coronavirus, the KCDC said it is currently monitoring 256.

                  Health authorities said they are conducting virus culture tests on 22 samples that it collected from people who retested positive.

                  Earlier this week, the KCDC released guidelines on handling relapse cases, which recommend cured patients to self-quarantine for 14 days after being discharged from hospitals. Municipal health authorities are also asked to monitor cured patients...

                  https://en.yna.co.kr/view/AEN20200417006800320
                  CSI:WORLD http://swineflumagazine.blogspot.com/

                  treyfish2004@yahoo.com

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                  • #24
                    Himachal Pradesh man who recovered from Covid-19 tests positive again

                    Coronavirus update: As per the statistics provided by the state health department, one of the three cured patients in Una has again tested positive.

                    INDIA Updated: Apr 19, 2020 06:17 IST

                    A person, who had earlier recovered from the novel coronavirus, tested positive for the infection again on Saturday, taking the number of active cases in Himachal Pradesh to 23, officials said.


                    One more person tested positive for Covid-19 on Saturday, taking the total number of coronavirus cases in the state to 40, according to the officials.

                    Recurrence of Covid-19 in one of the patients who had recovered from the infection has been reported from Una district, a health official said.

                    As per the statistics provided by the state health department, one of the three cured patients in Una has again tested positive....https://www.hindustantimes.com/india...iTLldroJK.html

                    CSI:WORLD http://swineflumagazine.blogspot.com/

                    treyfish2004@yahoo.com

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                    • #25
                      https://www.businessinsider.my/5-cov...again-the-star
                      According to The Star, five such patients in Sabah’s Sandakan and Kinabatangan tested positive for Covid-19 just two days after recovering from the virus.

                      On April 18, the state government had said that 35 patients in these areas were recovered. This number was revised two days later, The Star said.

                      According to the new website, the Sabah Health Department later confirmed that patients who were declared recovered had tested negative in two Covid-19 tests.

                      However, the five patients later tested positive again.

                      But this is not a unique situation to Malaysia. On April 19, CNN reported that 179 recovered patients in South Korea later tested positive for Covid-19 again.
                      "The only security we have is our ability to adapt."

                      Comment


                      • #26
                        Virus from relapse cases not highly infectious: KCDC
                        16:17 April 22, 2020

                        SEOUL, April 22 (Yonhap) -- South Korea's health authorities said Wednesday the novel coronavirus detected from the country's relapse cases appears to be not very infectious or transmissible.

                        Of the 39 culture tests using samples collected from people who retested positive for COVID-19 after making full recoveries, six were completed and all tested negative for the novel coronavirus, according to the Korea Centers for Disease Control and Prevention (KCDC).

                        "Although their polymerase chain reaction (PCR) tests were positive, they tested negative after being cultivated in isolation, meaning the viruses from relapse cases have very low or no infectious power," KCDC chief Jeong Eun-kyeong said.


                        ...
                        South Korea has reported 207 relapse cases of COVID-19.


                        https://en.yna.co.kr/view/AEN2020042...ience/medicine
                        CSI:WORLD http://swineflumagazine.blogspot.com/

                        treyfish2004@yahoo.com

                        Comment


                        • #27
                          ‘Repeat virus patients have little or no infectivity’: KCDC

                          By Kim Bo-gyung
                          Published : Apr 22, 2020 - 17:08 Updated : Apr 22, 2020 - 17:15
                          (Yonhap)
                          South Korea’s health authorities said Wednesday that they believe patients who test positive for the novel coronavirus after being declared virus-free have little or no ability to infect others.

                          The center has completed in-depth examinations of six out of 39 relapses so far, and all six patients came out negative in virus cultivation tests, according to the Korea Centers for Disease Control and Prevention.


                          Korea has 207 patients who have tested positive for a second time after apparently making a full recovery.

                          “Even though they tested positive for the virus that they showed to be negative after the virus was separated and cultivated separately has led us to believe they have little or no infectivity,” KCDC Director General Jeong Eun-kyeong said during a daily update on the novel coronavirus situation.

                          Reemergence of the virus rose as a point of concern with cases of patients catching the virus after being declared virus-free, coupled with health authorities warning the contagion is most likely to strike again.

                          Health authorities have also tested 25 survivors of the novel coronavirus and found that they had developed antibodies after being infected.

                          Out of 25 survivors with coronavirus-neutralizing antibodies, 12, or 48 percent, tested positive for the virus again in genetic testing, according to the KCDC.


                          “We speculate the duration in which the virus remains in patients’ body differs case by case, even though they have developed antibodies. Additional research is...http://www.koreaherald.com/view.php?ud=20200422000768
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                          treyfish2004@yahoo.com

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                          • #28
                            https://cyprus-mail.com/2020/04/23/c...ting-positive/
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                            treyfish2004@yahoo.com

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                            • #29
                              https://www.livescience.com/coronavi...s-in-eyes.html
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                              treyfish2004@yahoo.com

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                              • #30
                                Recovered coronavirus patients in China test positive weeks later


                                By Jorge Fitz-Gibbon

                                April 22, 2020 | 12:39pm | Updated
                                Recovered coronavirus patients in China test positive weeks later
                                ....
                                Doctors in Wuhan, where the outbreak emerged in December, say the patients all tested negative for COVID-19 at some point during their recovery — but then began testing positive again without showing symptoms as much as 70 days after being cleared.


                                Chinese officials have not released numbers on how many coronavirus patients are part of the phenomenon, but data from Chinese hospitals obtained by Reuters and other media outlets suggest there are at least dozens.

                                So far, there have been no confirmations of newly positive patients infecting others, according to
                                Chinese health officials.....


                                In South Korea, about 1,000 people have reportedly tested positive for four weeks or more, while officials in Italy found that patients could test positive for over a month....
                                https://nypost.com/2020/04/22/recove...e-weeks-later/
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