感染病是如何传达？

How can infectious diseases be transmitted?

Today we are going to talk about the topic: How can infectious disease be transmitted? A contagious disease will be spread by following ways:

Animal to Person：Quite a few human diseases are transmitted to humans by animals, especially mosquitoes and fleas. For example, humans can become infected malaria when they are bitten by a mosquito infected with the malaria parasite. In the real history, fleas were the source of black death.

Person to Person: Many diseases that affect the respiratory system are passed from one person to another through the air by a sneeze or cough. Pathogens can also be passed when an infected person touches another person.

Contaminated objects, water and food to person: If pathogens from infected person pollute the environment, the range of transmission will increase, and more people will be infected.

病毒如何可以进进人体？

How did virus come into human body?

Now the question from you will be how did viruses come into human body? Viruses can come into your body through all your openings（eyes, mouth, ears, noses, anus and even cuttings）.

病毒分开人体会存活多久？

How long will viruses survive after leaving our bodies?

If the viruses leave human body, how long will they survive? In dry environment, viruses can survive a few minus to 48 hours. And air and UV light can kill them sooner. But they can remain longer in wet environment.

如何庇护本身？

How to protect yourself?

Personal sanitation团体卫生：

Wear facemask, Wash your hands, No eyes or nose rubbing.

佩戴口罩，勤洗手，勿擦眼睛和鼻子。

Household Precautions居家留心事项：

Keep your home clean, including pet’s belongings. 坚持家庭清洁，包孕宠物用品；

Open windows for better ventilation. 开窗坚持空气疏浚流畅；

Close the toilet prior to flushing .冲厕时盖厕板。

Outdoor Precautions外出留心事项：

Avoid crowded places .避免往人多中央；

Avoid wet markets. 避免前往湿市场；

Avoid going out if you are feeling unwell.假如感到不适，请勿外出；

Avoid eating wild animals. 避免食用野生动物。

Boosting Immunity提升免疫力：

8 glasses of water everyday. 天天8杯水；

Eat more vegetables and fruits. 多吃蔬菜和水果；

Step out in the Sun. 晒晒太阳；

Regular Exercises. 坚持锤炼；

Adequate Sleep. 充沛睡眠；

Stay away from 2nd hand smoke.  远离二手烟。

Every wants to know what will be our future in this battle. Tomorrow we will use a classic example of rabbits VS viruses to tell you the answer. Furthermore, we are going to talk about the future usage of viruses. Some viruses can help us to solve the problem of killing cancer cells. 

See you tomorrow!

附上课程视频：

B站有完整的课程视频，链接如下：

https://www.bilibili.com/video/av86779435