OVERVIEW OF THE IMMUNE SYSTEM
ONTOGENY AND PHYSIOLOGY OF IMMUNE SYSTEM
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Influenza strains that sweep around the world often carry names such as Shanghai H1N1 or Mexico City H2N2. The viruses vary in H and N surface proteins because
|
the viruses reproduce and attack people in cities more often.
|
|
these viruses emerged as stray DNA from the genomes of people in these cities.
|
|
this is where the antibodies of immune people began to break down and the old virus was again virulent.
|
|
when infected people develop immunity to the present virus, strains that mutate sufficiently to be outside the range of immunity are soon spread in highly populated areas.
|
Explanation:
There is 1 question to complete.