I was asked a question on WeChat just now, how to explain the situation below. The above are the vaccination status (blue curve) and daily new cases (brown bar graph) in Israel, the UAE, Chile, and the United States. Among them, Israel has adopted Pfizer’s mRNA vaccine, and the UAE is China’s Sinopharm inactivated vaccine. , Chile is China’s Kexing inactivated vaccine, and the United States is Pfizer, Moderna’s mRNA and Johnson & Johnson’s adenovirus vector vaccine. I can probably think of the mentality of people who repost group pictures in WeChat groups. It’s nothing more than that, if you take a look, the vaccine from Coxing won’t work, but the vaccine from Pfizer will do. So I said, this kind of person is either stupid, bad, or just pretending to be confused. First of all, to emphasize that vaccines are indeed the only way to end the new coronavirus pandemic. But the premise is that after the formation of herd immunity. Before the herd immunity barrier is established, vaccination will not have any effect on the ongoing epidemic. There are several reasons for this. First of all, whether the epidemic situation in a region is aggravated directly depends on the local epidemic control ability and residents’ awareness of protection. I believe everyone can realize this. Secondly, the vaccination and effectiveness of the vaccine need a long period. For example, the national medicine vaccine, for example, can achieve a better protective effect after 2 injections and 20 days after vaccination, that is, 2 injections from the first injection. The effect can only be achieved after a month. Then there is the problem of vaccine protection rate. There is no 100% effective vaccine, which has a lot to do with individual differences. Finally, there is also the issue of virus mutation. At present, the viruses in South America and South Africa have the ability to escape the protection of existing vaccines. So even if a certain area has reached the base of herd immunity, it is only for the past viruses. For new mutations The virus strain has not yet achieved the effect of herd immunity. So again, the vaccination rate will not have any direct impact on the current epidemic. Just like the current Ruili epidemic, although the country has allocated vaccines to give priority to Ruili, it has nothing to do with this epidemic, just to prevent similar incidents from happening again in the future. Going back to the pictures just now, let’s make a comparison with that of Israel. Israel can be said to be the country with the most and fastest vaccinations in the world. If you want to use this chart to explain that Pfizer is effective, then please explain which trough in October 2020 is caused? This is obviously before vaccination, right? This data shows that the time point of the daily decline in the United States is obviously related to the time of the US general election. In other words, the series of epidemic prevention measures adjusted after Biden took office are much more effective than vaccines. Moreover, the data at the end of this chart shows that the epidemic situation in the United States has rebounded. The core point is not the problem of vaccination rate, but the increase in travel during the spring vacation and the indifference to the American epidemic. Here is also an extreme example. In our country, the number of vaccines administered by Sinopharm, Kexing and other domestic vaccines, and the number of vaccination doses per 100 people is gradually increasing, and the daily rate of new additions is very low. What can this explain? Can this data be used to illustrate the effectiveness of the vaccine? This can only show that China’s epidemic prevention measures are very good, right? So, when you see someone taking these pictures or similar pictures to explain things, please put them back elegantly.