As the number of coronavirus cas ris, scientists around the world are committing entire labs to create a vaccine.花枝鼠怎么养and generally读书笔记童年,as Dr. Gregory Glenn said, ‘It takes an average of eight to ten-year time to develop a vaccine’
However,as the picture shows ,on faburary, Only two moths after the virus first discovered in china,A US biotechnology company called Moderna declared that they have created a vaccine against the novel coronavirus竹笋鸡汤.
So how can scientists quickly develop such a vaccine?
By the magic? Definately not!
In fact, just as my Speech title indicated,they aquired this achievement by using A new generation of vaccine technology ,-- the mRNA vaccines.
So how does mRNA technology work and why it can be so efficient?
To better clarify the mechanism,we first need to grap some background knowledge of the vaccines and here it is.
A vaccine is esntially a pure preparation of one or more key components of the virus and the function of it is to To give the immune system a preview of the virus without causing dia and moreover,This preview tells the immune system to ek out and attack the virus containing tho specific proteins if the real virus ever shows up.
Since the vaccines are such a powerful tool,how can we get it?
traditionally, due to the differences of virus processing procedures , there are two differet approaches.the first and most common way is by Using the weaker and tamer veision of thogen ,bad on this method, the attenuated vaccines and inactive vaccines were created, the cond method is by Using one part of the pathogen (antigen抗原) that induces the body to produce antibodies ,bad on this idea the, subunit vaccines were created.
Both of the two traditional methods are realized in the laboratory and then making test on animals and people.However, Growing the virus and purifying them or the proteins at medically acceptable pharmaceutical scales can take years which is apprently cann社会主义核心价值观心得体会’t be
accept by the public.
So, back to our topic? 华为nfcWhy the mRNA vaccines can be made so quickly.
The reason is that this technology ud a different strategy,which is ‘Let our bodies make their own medicine’.Instead of the triditional vaccines which were made out side of our body,the mRNA vaccines attained by firstly isolate the very gene gment that make the specific antigens called masge RNA or mRNA ,then injected the it to the body to instruct cells making antigens,which could caus a stronger immune respon and prepares the body for any future treats.
And there are two major advantages of this kind vaccines,firstly
与众不同的心理学Since rarchers don't need to grow large amounts of the virus,RNA vaccines are faster to develop than ver , becau they do not carry the risk of the injected virus becoming active, or a protein contamination ,they are safer than triditional ones.
For now, you may already able to answer the question I propod at the beginning of the speech and understand the reason behind.
so finally, I want to share with you an important thing I learned from this new vaccines.I am currently doing the rearch of artificial intelligence, and I ud the to define the intelligence as the things achieved by using chips and algorthms. However, through this study I realized that there is an other intelligence called ‘Let the bodies make their own 'medicine'' which attained by making deep study on the subject and ud the inner relationship to solve problems. This may even much more efficient than other manully designed ones.And if you are trying hard to do an optimization task,this may offered an inspiration.
The reason is that 写事作文450字Instead of the standard vaccines where viral itlf or it’s proteins are ud to immunize, the恐龙的相关资料 mRNA vaccines provides a synthetic mRNA of the virus, which the host body then us to produce the viral proteins itlf.
ud a diferent strategy.
here it is.firstly,it us the specific RNA of vi