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That is the question that all experts have been asking since the beginning of the pandemic: how long does it last? immunity from our body to COVID-19 after recovering from infection? Now one Australian study, Published in Science immunology, confirms what other research has already hypothesized: at least eight months. And it could protect us even longer, since it was just eight months ago that the health emergency broke out around the world, forcing the international community to question the characteristics of Sars-Cov2. The news is also important because it reinforces the probability that I vaccinations anti-Covid work for long periods.
The study, published on December 22 in the prestigious scientific journal, reveals that some cells specific within the immune system – called memory B cells – “remember” the virus infection and by re-exposure to the same virus trigger a protective immune response. Our body, therefore, begins a rapid production of antibodies as it does with other pathogens. The researchers recruited 25 Covid-19 patients and collected 36 blood samples from day 4 post-infection to day 242. As with other studies, looking only at the antibody response, the researchers found that antibodies to the virus began to decrease after 20 days from infection. However, it turned out that all patients continued to have memory B cells, capable of “recognizing” one of the two protein components of the Sars-Cov2 virus.
These virus-specific B cells remained stably present in patients until eight months after infection. According to the teacher Menno van Zelm, from Monash University, one of the authors of the research, the results give hope about the effectiveness of any vaccine against the virus and also explain why there was so much Few examples of actual reinfection among millions of people who tested positive for the virus around the world..
His Science Immunology studied it
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