At the beginning of the pandemic, the coronavirus vaccine is still a critical juncture
In the early stages of the pandemic, when the coronavirus vaccine is still unknown, the term “herd immunity” means extinction-at this point, enough Americans will be protected from the virus so that we can get rid of it. virus.Take our lives
Now, more than half of adults in the United States have received at least one dose of the vaccine. However, the daily vaccination rate is declining, and there is a general consensus between scientists and public health experts that the threshold of herd immunity cannot be achieved, at least in the foreseeable future, and perhaps never.
Instead, they concluded that the virus will no longer be a long-term promise, but is likely to become a controllable threat that will continue to spread in the United States in the next few years, leading to hospitalizations and deaths. The smaller number.
How small this number is is uncertain, and to a certain extent depends on where in the country and the world is vaccinated, and how the coronavirus evolves. However, it is already clear that the speed of virus changes is too fast, the spread of new variants is too easy, the speed of vaccination is too slow, and herd immunity cannot be achieved in the short term.
Experts believe that continuous vaccination, especially for people at higher risk due to age, exposure or health reasons, is essential to limit the severity of disease outbreaks, if not regular.
“This virus is unlikely to disappear,” said Rustom Antia, an evolutionary biologist at Emory University in Atlanta. “But we want to do everything possible to see that it may develop into a mild infection.”
Dr. Anthony S. Fauci, the top Covid-19 adviser to the Biden administration, acknowledged the change in expert thinking.
He said: “People are beginning to feel confused and think that until this mysterious level of herd immunity is reached, no matter what the number is, the infection will not decrease.”
He added: “This is why we no longer use the term “herd immunity” in the traditional sense. “I mean: forget it. If enough people are vaccinated, the infection rate will drop. “