On November 20, 2022, medRxiv, the School of Public Health of Harvard, Yale and Stanford University, uploaded the latest research progress on immune defense against Omicron among American people.
It was found that 97.8% of Americans were immune to COVID-19; The study also warned that with the evolution of the virus and the continuous reduction of immune antibodies, we need to be alert to the new wave of COVID-19 infection.
During the period from December 2021 to November 2022, the immunity of the United States to SARS CoV-2 Omicron variant infection and serious diseases has changed.
1. Immune protection and attenuation are based on infection/vaccination. 2.
The model is based on vaccination and infection.
2. Proportion of people with different immune conditions
The research model shows that 7% of people in the United States are repeatedly infected, only 55.7% are repeatedly infected with vaccine, only 2.4% are infected once, and 29.1% are infected once.
In fact, 94.2% of Americans are infected with COVID-19 virus. Only 3.6% of the vaccines have not been infected.
2.1% of them were neither vaccinated nor infected.
Immune status of COVID-19 in American population
Although many infections can be seen everywhere, people are still optimistic.
Because Omicron is highly infectious, most Americans choose to take off their masks after summer vacation, and the proportion of re infection will only increase.
From December 2, 2021 to November 9, 2022, plus vaccination; Americans' protection against COVID-19 infection increased from 22% to 63%; Prevention of Omicron protection against severe infections increased from 61% to 89%.
Although the infection rate in the United States is increasing, even the proportion of repeated infection is also increasing, people are more and more optimistic about COVID-19, especially more than 96% confidence in the prevention of severe cases.
2. Emotional expression
94.2% of people are infected. No wonder most people don't wear masks, which makes it difficult for me to understand.
Aren't these people afraid of death?
In fact, in the United States, 61% of severe infections protected against Omicron increased to 89%.
The effectiveness of strengthening vaccination against Omicron mutant infection can be higher than 95%.
With the addition of Paxlovid antiviral treatment, the recent death toll in the United States has also dropped to the low point since the epidemic.
As a result, people's optimism towards COVID-19 gradually increased. Here you may find a 2.1% crowd very confusing. People who have neither been vaccinated nor infected with COVID-19 should probably go to the American Institutes of Health to register as early as possible.
Perhaps the antidote (gene) to prevent COVID-19 completely lies in these people.
A new wave of epidemic risks is also accumulating.
The American mood towards COVID-19 has undergone a fundamental change, with 76% optimistic about preventing infection and 96% optimistic about preventing severe cases.
However, the researchers also warned that the United States is also facing a new wave of COVID-19 infection risk due to the evolution of COVID-19 and the gradual decline of immunity.
3. In the end, the protective power of American vaccination and infection with Omicron severe COVID-19 was 89%; Among those infected with COVID-19, the protection of intensive vaccination against severe cases exceeded 95%.
But this situation has increased people's optimism.
However, it should be noted that in the United States, behind the low number of new deaths since the pandemic, those who are sensitive to COVID-19 have left the world forever, and the number has reached 1.08 million!
It is Singapore's epidemic prevention measures in the East Asian cultural circle that are thought-provoking, rather than the United States' COVID-19.
No vaccine epidemic was cleared in the early stage, vaccination was fully improved in the middle stage, and the later stage was orderly liberalized. Japan and South Korea, which belong to the East Asian cultural circle, can also provide us with a lot of experience.
We will make every effort to promote vaccination, so that the people have good compliance, wear masks, and control the gathering after opening up; These are the key factors for the low global cumulative death toll in these countries.