As per two recent, non-peer-reviewed studies, people who recovered from COVID-19 produced a robust immune response that was superior to vaccination alone, and adding one or more vaccine doses offered even stronger protection.
This only indicates that the body’s immune system, which has fought off previous infection, remembers the virus and provides protection against another episode of COVID infection. But how does the body remember the virus?
The human body has two main lines of defense against viral invaders i.e. the innate immune system and the adaptive immune system.
An innate immune response kicks in early when a viral particle is identified early in the stage. This goes on to trigger a host cell to release a protein that hinder the virus’s replication, or it can involve the immune system to try and shut down the compromised cells.
On the other hand, an adaptive immune response takes more time in triggering a response, because the immune system has to first recognize the viral invader before initiating a specialized attack. Antibodies are part of the adaptive immune system. Once a virus has been detected and identified, the B cells make these antibodies that can latch on to viruses and block them from getting into cells.
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