Shishir2

White blood cells are cells that fight the germs from entering the body. And on the other hand leukocytes are organisms that go around the body and prevent diseases and infections by sending out a signal to the immune system.
 * Shishir:**
 * 1. Describe the difference between leukocyte and white blood cells. **

Proteins come from tofu, meat, eggs and etc. Once they are in the body it goes to different areas of the body and help it develop of growth and be healthiness.
 * 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. ** It is basically a germ getting into ones body and making it sick. And the person getting sick will cough or do something that will make another one sick and this act spread upon Europe. So back then they did not take action on hygienic acts.

It means that there is 20% chance of death if one is infected by the bird flu.
 * 4. The recent bird flu virus, H7N9, has a 20% fatality rate if one is infected. **
 * a) what does it mean - 20% fatality rate? **

Viruses spread across to many human beings unlike the flu, it stays with one body but is takes a longer period of time to recover for the person.
 * b) How is this virus different from a common flu virus? **

There are ways to prepare for a fatal disease by being more hygienic (eg. washing hands, sneezig with mouth closed and etc). Another way is to eat healthier food (eg. Mineral water, foods from trust worthy and branded shops and etc).
 * c) Are there ways to prepare our body immune system against such fatal, deadly virus? **


 * d) The bird flu virus wasn't infectious to humans before; explain why it suddenly turned viral and **
 * harmful to humans. **The bird flu virus became suddenly infectious  to humans because we have been taking antibiotics, which the germs develop a skill called antibiotics resistance in which it adapts to the power of the antibiotics and takes over the body.

The virus has changed its purpose. So rather than infecting one person for a long time, it spreads to affect more.
 * 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? **