It has been two years since the new coronavirus developed to this day, but it has not completely disappeared, and it still shows a scattered outbreak in many places. Although for humans, the new coronavirus is no longer as difficult as before, because a vaccine that can effective

One stitch, two stitches, strengthening needles, and the fourth stitch are coming again? Is the vaccine protective wall okay? Two years have passed since the development of the new coronavirus today, but it has not completely disappeared, and it still shows a scattered outbreak in many places. Although for humans, the new coronavirus is no longer as difficult as before, and has been successfully developed because of a vaccine that can effectively resist the virus, and has basically achieved national vaccination. However, whenever the epidemic is mentioned, people cannot calm down for a long time. Some stories and scenes that happened during this period really touched people.

01

How scary is the novel coronavirus?

The severity of the novel coronavirus mainly depends on different hosts, that is, the physical condition of different patients and the severity of pneumonia, and the condition is different.

Novel coronavirus pneumonia is an infectious disease caused by the novel coronavirus. can be clinically divided into mild, ordinary, severe and critical.

mild novel coronavirus: often have mild clinical symptoms, may have cough, or you may have fever or no fever. The process may be similar to the process of mild cold, , but such patients are still contagious;

ordinary type: mainly manifested as cough, fever and difficulty breathing, and difficulty breathing is mainly due to the influence of the virus. It causes problems with gas exchange in the lungs;

severe and critical: manifested as dyspnea, septic shock, difficult to correct metabolic acidosis and coagulation dysfunction. Lung CT lesions may progress by more than or equal to 50% in 24-48 hours, and there will be rapid respiratory rate and failure of multiple organs.

02

hml6Have the fourth shot of vaccine been launched abroad?

looks around the world. Israel is the first country to receive the fourth dose of new crown vaccine . In addition to Israel, the United States, Germany, Thailand and others plan to start the fourth dose of the new crown vaccine.

Israel: On January 4, Israeli Prime Minister Bennett said that according to the preliminary data obtained, it is safe to receive the fourth dose of the new crown vaccine and can increase the antibody level in the vaccinator to 5 times before vaccination.

Previously, on January 2, the Israeli Ministry of Health had approved the fourth dose of the new crown vaccine for and medical workers. The theoretical basis for the fourth dose of the new crown vaccine in Israel was based on a trial at Sheba Medical Center in late December. A total of 150 participants received three doses of Pfizer /BioNTech vaccine. One week after receiving the fourth dose of , the antibody level of the participants jumped by 5 times on average. In terms of safety, the adverse effects of the fourth dose were the same as the first two shots, such as arm soreness, low fever, , etc.

03

Do you want to open the game in China? Zhang Wenhong : It depends on two situations

As for the country, it has not been determined whether to get it. Zhang Wenhong, director of the National Infectious Disease Medical Center, said in an interview:

"At present, my country's third vaccine is still in progress, and the epidemic prevention and control is relatively good. The fourth vaccine of does not need to be so anxious now , and more international experience can be used as a reference at that time."

In general, it depends on these two situations: "One is the antibody value of the population after the third shot in my country, and the future development of the epidemic in my country, and the overall value of can determine whether to get the fourth dose of the new crown vaccine."

04

"subsequent injection" is meaningful?

When the COVID-19 vaccine was first developed, there were only two injections. At this time, the vaccine was mainly used to inhibit strains without mutations.

But over time, a mutant strain represented by Delta was appeared, so the third and fourth doses of vaccines appeared, with the purpose of raising High immunity of humans. The reason why

has subsequent injections is to help people protect their life and health , and at the same time, it can also show the world our determination and perseverance to resist the new coronavirus.

and Chinese citizens can get vaccinated for free, does not charge any fees, This is also a major proof of China's overall strength.

So, when will my country start the fourth round of vaccination? Let's wait and see!