85 new asymptomatic cases in Zhengzhou are 5 times the confirmed case, and the dream of herd immunity has been shattered?

Although the overall coverage of the new crown vaccine in China is gradually increasing, there are still a few people who think that as long as the people around are vaccinated and herd immunity is formed, I will be safe!

If this sentence is placed in the first half of this year or last year, it seems to work.
However, the development of the epidemic is ever-changing.
Now, this sentence is no longer valid, but even more dangerous! The editor of Metz Medicine has to talk to this group of people!

What is herd immunity? Taking the transmission R0 of the original strain of the new coronavirus as an example, it is true that 60% of the population can be fully immunized (equivalent to 65% of the mRNA vaccination rate and about 80% of the domestic inactivated vaccine).
It is equivalent to everyone being safe
.

In the face of the Delta mutant strain, there is no such thing as herd immunity! However, the new crown virus has now evolved into a devil.

R0 reaches 9, which means that even if vaccination in the population reaches 100%, there will still be a certain degree of infection and transmission! The so-called 60% or 70% herd immunity is no longer effective! ! In China, the epidemic in the past week has also made people sweat
.

From the 7·20 epidemic at Lukou Airport in Nanjing to the Sixth Hospital in Zhengzhou City, Henan Province

Source: CDC Disease Control Person

The fundamental reason why the Delta mutant strain is difficult to control is that the viral load of the infected person of the Delta mutant strain is extremely high
.

The Guangdong CDC study showed that the viral load of people infected with the Delta mutant strain was 1,260 times that of the original strain of the new coronavirus
.

As a result, the Delta mutant strain is extremely infectious and has a longer transmission time, and the vaccinators are also extremely infectious

The war against the epidemic has changed, thinking has changed, and the role of vaccines has also changed! Just like this, the CDC documents repeatedly emphasized: "The war has changed!" But I don’t know if my friends have noticed that in the US CDC documents, the Delta mutant strain is described so terribly, with special emphasis on "the more breakthrough infections will be.
" "The more", even in a COVID-19 outbreak in Massachusetts, 74% of the infected people were vaccinated (346 of the 469 infected people were vaccinated)
.

Judging from the case of the infection in Nanjing, China, most of the cases have also been vaccinated! This means that even if you have been vaccinated, you can easily get infected! In the official media at home and abroad, "vaccine to prevent the infection and spread of new crown virus" is now rarely promoted, and more is "vaccine to prevent the risk of severe new crown pneumonia"
.

In fact, whether it is a domestic vaccine, an international mRNA vaccine, or other types of vaccines, it will be more and more difficult to prevent re-infection (on the one hand, the virus continues to mutate, on the other hand, the antibody titer in the body is declining)
.

However, both the East and the West vaccines have the same skill: to prevent severe illness! For the highly contagious delta virus, the US CDC's advice is to increase the vaccination rate and wear a mask

In China, the daily vaccination of vaccines exceeded 20 million doses per day at the peak, but then it quickly dropped to only 7 million doses per day.
With the spread of the epidemic caused by Nanjing, the number of daily vaccination doses has been repeated.
Increased to more than 15 million doses
.

This is consistent with the concept of strengthening vaccination in China

The case fatality rate in the United States is 0.
4%, and many of them are unvaccinated
.

Vaccination in the UK is higher and the mortality rate is very low

From July 31st to August 3rd at 24:00, there were new local cases in Henan

Correspondingly, people who have not been vaccinated have become more dangerous, or more likely to be infected with the new coronavirus than ever before
.

It was originally hoped that through the establishment of herd immunity by vaccinators to block the epidemic, so that those who have not been vaccinated can benefit from it; now it is completely different.

But in any case, for people who have been fully vaccinated with the new crown vaccine, it is still recommended to continue to wear a mask
.

Because this is not only one of the key measures to protect yourself, but also protect your family and others

Although the overall number of infections in the country is too small, it is really difficult to assess how effective the vaccine is
.
However, there is one country that can be used as a sample, that is, the United Arab Emirates (UAE).
The vast majority of people are vaccinated in China, and the vaccination rate exceeds 80% of the population and 90% of adults
.
The figure below shows the number of new infections (approximately 1500), deaths (approximately 4 people), and 0 severely ill people in the UAE (UAE) every day.
This is the reality after vaccination
.

The United Arab Emirates (UAE) ranks first in vaccination rates
.
More than 71% were fully vaccinated, and 8.
3% received a dose
.