COVID-19 reinfection unlikely for at least six months, study finds
21 Novembre, 2020, 09:38 | Auteur: Yves Courtet
The researchers stated that the level of infection depends on many factors.
The results were "consistent with Sars-CoV-2 re-exposure that did not lead to repeat symptoms", the study said.
Examining the components of immune memory, the scientists found that that antibodies were "durable" with only "modest declines" emerging at six to eight months.
"Several studies have found that individuals with asymptomatic infection may clear the virus faster, suggesting that those without symptoms may be as infectious as those with symptoms at the beginning of infection, but may be infectious for a shorter period". Humans make SARS-CoV-2-specific antibodies, CD4+ T cells, and CD8+ T cells in response to SARS-CoV-2 infection. Government scientists think the Covid epidemic could now be in retreat. The researchers said there appeared to be an increase in memory B cells over time.
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Isolated cases of re-infection with COVID-19, the disease caused by the SARS-CoV-2 virus, had raised concerns that immunity might be short-lived and that recovered patients may swiftly fall sick again.
In a statement to United Kingdom based Science Media Centre, Stephen Evans, Professor of Pharmacoepidemiology, London School of Hygiene & Tropical Medicine, said that there are two major consequences if the findings are as they say. "Firstly, although most of the cases described here had mild disease, it looks as though their immunity to a second infection is reasonably high".
However, overall prevalence of coronavirus infections rose to one in 80 people from one in 85 the previous week. "This means that the population level of immunity may be rising which will eventually lead to reduced transmission", Evan said adding that this, coupled with immunity being conferred by vaccination, offers prospects of transmission of the virus being markedly reduced over the next year or so.
"Secondly, it is probably very good news for vaccines also being able to provide immunity that is more than very short-term". The Wu family still runs the business but makes use of its partner to secure prime locations for its restaurants, particularly in Central, Hong Kong's main business district."[James Wu] played a key role in forging the successful partnership between Maxim's and Jardines almost five decades ago, which remains strong and flourishing to this day", said an obituary by Jardine Matheson and The Dairy Farm Group in the Post on Thursday."We will greatly miss Dr Wu as a business partner and as a friend, and we would like to express our condolences to his family."More from South China Morning Post: * Hong Kong caterer Maxim's told to stay clear of courts - and cockroaches * Maxim's founder S. T. Wu dies, aged 92This article James Wu, co-founder of Hong Kong's biggest restaurant group Maxim's, targeted during protests, dies aged 98 first appeared on South China Morning PostFor the latest news from the South China Morning Post download our mobile app.
It also looked at isolation of the live virus - a stronger indicator of a person's infectiousness, as the live virus is isolated and tested to see if it can successfully replicate in the laboratory.
And those people with high levels of the relevant T-cells "appeared to be protected from Covid-19 in the four months after recruitment", whether they had previously been infected Covid-19 or not.
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The decision followed a hearing held in private, and Warby said the reason for the delay request should be kept confidential. The articles were published in the Mail on Sunday newspaper and on the MailOnline website in February 2019.
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As of Thursday, the Island Health region has recorded 429 cases of COVID-19 since the pandemic began, 118 of which are now active. Bonnie Henry also announced new temporary lockdowns on social gatherings and certain industries across B.C.
NY has reported at least 34,187 deaths of people due to COVID-19, according to data from John Hopkins University & Medicine. New York State Governor Andrew Cuomo holds daily media announcement and briefing.
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