Vaccines are biological agents to prevent infectious diseases. Generally speaking, it is made by extracting antibodies from viruses. After injection, people will produce corresponding antibodies, thus enhancing human immunity to infectious diseases and stimulating human body to produce protective immunity. Is novel coronavirus vaccine active immunotherapy, or does it need 654.38 billion people to build an immune barrier? In order not to affect vaccination, Xiong Xianjun, director of the Medical Service Management Office of the National Medical Insurance Bureau, said that the state had prepaid 24 billion vaccination fees to make money for vaccines. In order to vaccinate the whole population, it is planned to use the balance of the overall fund to provide vaccination in novel coronavirus. Vaccination is an effective way to prevent infectious diseases, so do you want to know about vaccines? Come and have a look with me.

First, the beginning of vaccine research has benefited all mankind.

In ancient times, infectious diseases would take countless lives and seriously threaten the health and quality of life of the ancients. In order to conquer large-scale infectious diseases, scientists invented vaccines, a biological agent that can fight infectious diseases. Smallpox broke out in England, Edward? Jenna found the milkmaid Sarah? Nelms was infected with smallpox, but her body showed no life-threatening symptoms. After Edward? Jenner's visit found that the milkmaids who had suffered from smallpox were busy milking cows and were not affected by the smallpox epidemic, as if smallpox was an infectious disease far away from them. Edward? Jenna decided to leave Sarah. Extract pus from Nelms and inject it into James? Phipps is on the arm. The first needle didn't cause any discomfort to the boy, so the second needle was Edward. Jenna increased the number of smallpox virus and gave it to James? Phipps injected it. A miracle happened, James? Phipps is still alive and kicking, completely free from smallpox virus infection. This incident caused a sensation in the local area. It turns out that the virus contains antibodies that can resist the virus! So scientists extracted a large number of antibody vaccines from cattle, and smallpox virus was eliminated by smallpox vaccine!

Second, active immunization in vaccines can prevent viruses in advance.

Vaccines are inactivated vaccines and attenuated vaccines made from pathogenic bacteria. When the human body suffers from foreign infectious diseases, the vaccinated body automatically produces the ability to resist, and at the same time produces corresponding antibodies in the body, so that the human body is no longer afraid of the invasion of infectious diseases. Inactivated vaccine and attenuated vaccine can provide effective protection for the body. Therefore, COVID-19 vaccine is an effective way to resist novel coronavirus.

So, friends, have you been vaccinated against COVID-19?