Thomas2

Thomas2

1. Describe the difference between leukocyte and white blood cells.
Leukocytes and white blood cells are the same.

**2. The term proteins are frequently used in the study of immunology. Explain the term/concept proteins.**

3. Explain why the Black Death virus, which has caused millions of deaths, was deadly using concepts of immunology.
The reason that the Black Death virus was deadly was deadly because it spread very easily which mean't that it would travel fast. Also there were no vaccines or antibiotics back then so the immune system had no memory of the virus.

a) what does it mean - 20% fatality rate?
20% fatality rate means that 20% of the people who have caught the virus have passed away and there is a 20% chance of dying from this virus.

b) How is this virus different from a common flu virus?
This is different from a common flu virus because the common flu usually has a very low fatality rate compared to H7N9.

===c) Are there ways to prepare our body immune system against such fatal, deadly virus? ===

You could get for example, vaccines which are where a harmless version of the virus gets injected into your body. Then the immune system will fight off the vaccine and it will gain memory of what the virus looks like. Last of all, the immune system will know what the virus looks like.

===d) The bird flu virus wasn't infectious to humans before; explain why it could become viral and harmful to humans. ===

If H7N9 wasn't harmful for humans it would begin to develop or mutate into a more complicated virus which would be even more harmful to humans and also infectious.

===e) Right now, the flu is unable to infect a person through human to human transmission; if it can infect through human to human transmissions, what could have changed in the virus? ===

If the flu was able to infect a person through human to human transmission, more people would get infected meaning that more people would get sick from it extremely fast. Also, the fatality rate would rise exponentially.