Two recent studies have shown that immunity to the emerging corona virus (Covid-19) can last for years or even a lifetime. What opens a great hope to control it. What are the details of this study? The answer is here, with the latest research data and published studies on the virus and its vaccines.
We start with immunity to the Corona virus, as both studies have shown that immunity to the Corona virus lasts for at least a year, and possibly lifelong, and improves over time, as it progresses. especially after vaccination, according to media, including New York. Times (with a report by Christopher Cabozziello and Deutsche Welle. Read also Coronavirus symptoms: 33 signs of infection These Arab countries deny the appearance of the black fungus that ravaged Corona patients in India After black and white … the yellow fungus appears Black fungus symptoms in Corona patients. 18 signs of infection
The first study, published in the journalNature, found that cells that preserve Corona virus memory remains in the bone marrow and antibodies can be secreted when needed.
Nature researchers wrote that circulating memory B cells directed against the “spike” protein were constantly detected in recovered individuals. In general, corona infection has been shown to stimulate a particularly strong and long-lasting immune response in humans.
As for the second study, it was published on the BioRxiv website and stated that the immune B cells that maintain memory for the Corona virus continue to mature and get stronger for at least 12 months after the initial infection with Corona virus.
In the second study, the researchers wrote that the data indicates that the immunity of recovered people will be long-lasting, and that recovered individuals who receive available messenger RNA vaccines will produce antibodies and immune memory B cells, which should provide protection against traffic. strains of the Corona virus.
They added that if memory (immune) responses develop similarly in vaccinated individuals, then the additional boost (inoculation with a booster dose of the Corona vaccine) in time with the available vaccines could cover most of the time. strains of concern.
When the virus is first encountered, the B cells multiply rapidly and produce antibodies in large quantities. Once the acute infection is brought under control, a small number of cells occupy the bone marrow, regularly pumping out modest levels of antibodies.
& nbsp; Koronavac reduces deaths by 97%
We are moving to Uruguay, where a recent study found that the Chinese Coronavac vaccine against Covid-19 reduces the death rate of this epidemic by 97%, while the effectiveness of the American Pfizer is 80%.
And the study conducted by the Ministry of Health in Uruguay, and its first results were published Thursday, and reported by the French Press Agency; “The decrease in the number of deaths from Coronavirus, more than 14 days after the administration of the second dose of the vaccine, amounts to 97% for Coronavac and 80% for Pfizer.”
The decrease in the number of infections with the Coronavac vaccine was 57%, compared to 75% for Pfizer.
For cases requiring intensive care, the study indicated an efficacy of 95% for Coronavac and 99% for Pfizer.
The study specifies that the figures are preliminary and “should be interpreted with caution, as they do not take into account the age of people, the diseases affected and the most vulnerable groups” such as workers of the health sector.< figure class = " wp - block - image ">< img src = " https : // www . aljazeera . net / wp - content / uploads / 2021/04 / انفغراف - نهائي . jpg ? w = 770 & amp ; resize = 770% 2 C 561 " alt =" " class =" wp - image -4500056 "/> figure >
& nbsp; Myocarditis
ThesiteFrench”LCI” said in a report that very rare cases of heart problems have been reported in adolescents or young people who have been vaccinated against the Corona virus this week by the US Centers for Disease Control and Prevention.
The researchers said the issue may be related to one of the newer side effects associated with the Corona vaccination, but there is no cause for concern, as most of them “appear to be benign “.
The magazine says cases of myocarditis have been reported in “adolescents and young men” who received the “messenger RNA” vaccine, such as that developed by BioNTech-Pfizer or Moderna, according to the US Centers for Control. United. On diseases and their prevention. And myocarditis, which often occurs “after receiving the second dose,” affects men more than women.
& nbsp; The United States Centers for Disease Control and Prevention has said that most of the cases reported to date “appear to be mild,” indicating that they are working to monitor the situation. And “relatively few” cases have been reported, according to the same source, who did not specify the exact number or age of the injured. These cases were mainly detected “within 4 days” of the injection.
And the United States Federal Public Health Agency posted advice on its site, urging doctors to exercise caution and pay attention to unusual heart disease symptoms in newly vaccinated young people.p>