Hello friends.
We all know that children need to be vaccinated continuously from birth to six years old. When I grow up and work, if I am with a hepatitis B patient, I have to get the hepatitis B vaccine, and if I accidentally get bitten by a dog, I need to get the rabies vaccine, and if the wound is deep when I am injured, I need to get the tetanus vaccine.
After vaccination, there are many diseases that no longer come to us to bother us.
So what exactly is a vaccine? Although we have all been vaccinated, our work, study, hobbies, firewood, rice, oil and salt do not have much intersection with vaccines, so we have less understanding of vaccines. I didn't go deep into what a vaccine is, and when one day I found out what a vaccine was, I was shocked myself.
What exactly is this miracle vaccine?
The answer is: vaccines are bacteria, viruses.
The vaccines that are injected into your body turn out to be bacteria, viruses. When you knew the truth, did you have the same shocked reaction as I did? But when we understand the body's immune system, the panic and surprise will be far away, and we will only sigh: Oh, I see!
There are many kinds of vaccines, we commonly use inactivated vaccines, live attenuated vaccines, toxoids, with the development of modern science and technology, and added DNA vaccines, peptide vaccines, vector vaccines, edible vaccines, ......Wait a minute.
For example, some time ago, the new coronavirus vaccine studied by the Wuhan Institute of Biological Products in our country is an inactivated vaccine.
Let me briefly introduce a few commonly used vaccines.
1: Inactivated vaccine.
Literally, inactivation is to kill viruses and bacteria to make vaccines.
2: Live attenuated vaccine.
It is to make a vaccine by weakening the virulence of the virus, but the virus is still alive. But you don't have to worry, because he will be too weak to cause damage to your body.
3: Toxoid vaccine.
It is a vaccine made by retaining immunogenicity by losing bacterial toxicity.
If you look carefully at the child's vaccination certificate, you will find that these vaccines are the types of vaccines that are often noted on the child's vaccination symptoms.
I won't go into the rest.
Seeing this, some friends may have an epiphany, it turns out that a little dirty and a little weak virus and bacteria can make our body healthier, so we don't need to wash our hands so diligently dozens of times a day, and a microbial pathogen that doesn't need to be washed doesn't exist anymore.
No wonder I was crazy when I was a child, and when I went home and grabbed something to eat, my mother would often say a sentence: If you don't eat dirty, you won't get sick, and if you don't get dirty, you won't get sick. This seems to have become a mantra that keeps people from getting sick, and there is a saying that adults often say, "Out of sight is pure", it turns out that it really makes sense.
That's right, friends.
Then why was the vaccine given. In other words, let some weak bacteria and viruses enter our body, but let us not get sick?
That's what we're going to talk about next time, the body's strong immune system.
That's all for this time, goodbye friends.