Immunity to the new chronobirus can last for eight months or more, according to a new study by the respected author scientists from major laboratories, which found that people who were cured of coronavirus developed “strong“B cell and T cell levels (which are needed to fight the virus) and” these cells can last a very, very long time in the body. “
The researchers collected blood samples from 185 patients between the ages of 19 and 81, who tested positive for coronavirus (SARS-CoV-2) at the beginning of the pandemic, and found that most had enough immune cells to fight the virus and prevent recurrence.
Moreover, these antibodies were “persistent” for many years, and showed very slow rates of decline that had been potentially protected for decades.
Although the study has not yet been reviewed in advance New York Times “It is the largest and longest-running study of immune memory against coronavirus to date,” he says.
“This amount of memory would probably prevent the hospitalization of the disease for most years from becoming a serious illness,” said Shane Crotty, a virologist at the La Jolla Institute of Immunology.
According to New York Times Apoorva Mandavilli reports that most people infected with coronavirus (more than 90%) will be “protected from reinfections for a very long time” and that vaccines (which “generally provide stronger protection and longer duration)” can lead to an even longer duration of immunity. “We probably won’t have to include people every year like we feared,” writes Mandavilli. The novel coronavirus “is not only asymptomatic but not infectious, it can end quickly,” said Dr. Alessandro Sette, an immunologist at the La Jolla Institute of Immunology and author of the study. The Times the report warns that scientists recently found that survivors of SARS, also caused by a coronavirus, have significant immune cells 17 years after infection. Researchers are hopeful that the study of antibodies may provide a model for the development of drugs to prevent or treat Covid-19.
A recent study at Imperial College London (which has also not been reviewed) found that immunity to Covid-19 can be reduced over time as antibody protection levels drop rapidly after infection. However, according to University of Arizona immunologist Deepta Bhattacharya, some evidence is emerging that infections with the common cold coronavirus are “the result of viral genetic variation” and that these concerns are not relevant to SARS-CoV-2.
11.3 million. As of Tuesday afternoon, more than 11.3 million people in the United States have tested positive for Covid-19 and at least 247,600 have died.
Coronavirus immunity in recent years, new data advice (NYT)
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