You and a friend were in line for a movie when you noticed the woman in front of you sneezing and coughing. Both of you were equally exposed to the woman's virus, but over the next few days, only your friend acquired flu-like symptoms and was ill for almost a week before recovering. Which one of the following is a logical explanation for this?
a. Your friend had antibodies to that virus.
b. You had an immunological memory of that virus.
c. Your friend had an autoimmune disorder.
d. Your friend had allergies.

You had an immunological memory of that virus.

Explanation:

The human body is made up of complex defence system called immune system. This immune system helps in prevention of foreign substances such as bacteria, viruses from invading the body system. It is divided into two major types: INNATE AND ACQUIRED IMMUNITY.

innate immunity is the inborn resistance that is present even before the first entry of a pathogen into the host. On the other hand, acquired immunity is the resistance that is absent at the first exposure to a pathogen but develops after being exposed to the pathogen. The second and subsequent entry of the same microbe will induce stronger and quicker immune response against the microbe.

Therefore, between me and my friend, I have been exposed to the virus before and have developed an immunological memory of the virus through acquired immunity while my friend hasn't been exposed to that particular virus before. She developed fever and chills because the body is trying to fight against the virus through the innate immune system. I hope this helps, thanks!

the ecg findings of an acute anterior myocardial infarction wall include: st segment elevation in the anterior leads (v3 and v4) at the j point and sometimes in the septal or lateral leads, depending on the extent of the mi. this st segment elevation is concave downward and frequently overwhelms the t wave.

explanation: