A study published in Nature Communications has found out that human exposure to the harmless coronavirus can provide immunity against SARS-CoV-2. The team of researchers analyzed human serum samples from 825 patients before the pandemic emerged and also examined 389 samples from the infected patients. The study found that a low level of antibodies was found in people who were exposed to common cold-causing coronavirus, while a high level of antibodies was found in people who were infected by a harmless coronavirus.
Results from the combination of both the studies show that people who have developed high antibody levels against harmless coronavirus had fewer chances to get hospitalized after getting infected by SARS-CoV-2. This type of immune response is called cross-reactivity, where T cells of the body get activated and play an important role against infection. This is only possible when people come in contact with the virus by either getting infected or after taking the vaccination. The whole mechanism works on the memory developed by the immune cells of the body. It does not guarantee the cure of the disease but instead works towards reducing the severity of the infection and shortening its duration.
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And with help of a vaccination drive, this can be achieved quickly and more efficiently. The immune response generated from the vaccination and from the prior infection, are effective against the infection compared to people who have taken only vaccination. Scientists have also suggested a booster third dose for people who have not been infected by the coronavirus, to achieve better immunity against the infection This study is proven very effective and important because as the cases are increasing worldwide, we need to find new ways for the treatment of SARS-CoV.
