Adrian caught a virus while staying with his grandmother. A few years later, his mother and sister got the same virus. This viru
s could spread through touch and direct contact. However, Adrian did not contract the virus this time, even though he was living with his mother and sister. Why did he not get sick? Adrian’s adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it.
Adrian’s innate immunity remembered the antigens from the virus and gave him lifelong immunity to it.
Adrian’s skin layer recognized the antigens and attacked them, which prevented the occurrence of the virus again.
Adrian’s innate immunity identified antibodies specific for the virus and targeted them against the antigen.
Adrian’s adaptive immunity produced a higher amount of specific antibodies for the antigen, preventing the virus.
Adrian did not contract the virus this time, even though he was living with his mother and sister<em> because Adrian’s adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it.</em>
The adaptive immune system consists primarily of the lymphocytes.
Whenever the body encounters the antigen, the lymphocytes of the adaptive immunity are activated to combat the infection and in this process, they also produce memory cells.
These <em>memory cells</em> protect the host from the infection from the same antigen in the future.
Due to the memory cells produced during the first viral infection, Adrian is protected from the infection after being exposed to the virus again.
