Question

Select all the correct answers. Adrian caught a virus while staying with his grandmother. A few years later, his mother and sister got the same virus. This virus 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.

Answer 1

Adrian did not get sick because his adaptive immunity provided him with lifelong immunity to the virus. The memory cells produced during his first infection helped his immune system recognize and respond faster and stronger to the virus, preventing illness.

Step-by-step explanation:

Adrian did not get sick the second time he was exposed to the virus because his adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it. The memory cells produced during his first infection recognized the virus and mounted a faster and stronger immune response, preventing the virus from causing illness again. Therefore, Adrian was protected from the virus due to his immune system's ability to remember and respond to previous infections.

Answer 2

Adrian did not get sick again because his adaptive immunity produced a rapid and specific immune response due to memory cells formed from his previous infection, providing long-term protection against the same virus.

Step-by-step explanation:

Adrian did not get sick from the virus a second time because his adaptive immunity remembered the antigens from his previous infection and produced a specific and rapid immune response. This is an example of naturally acquired active immunity, where exposure to a pathogen activates the adaptive immune system, resulting in the formation of memory B cells and memory T cells which confer long-term protection from reinfection by the same pathogen. Due to these memory cells, Adrian's immune system was prepared to mount an immediate response to the virus, effectively preventing the virus from causing disease.