Combined immunity is defined as a condition in which such a large percentage of the population in a given community is resistant to an infectious disease. As for the corona virus, immunity may be the result of a vaccine or an infection, but it is not clear how much care is needed to prevent infection. At first, epidemiologists talked about 60 to 70 percent, but then more estimates began to emerge.
In the United States, 32 percent of people are currently vaccinated against Govt-19, and Ashish Jah, dean of the Faculty of Public Health at Brown University, believes that about 60 percent may already have “some immunity”.
However, in a country of more than 330 million people, tens of thousands of cases are increasing daily, while the vaccination rate has been declining for more than two weeks. In mid-April, the Centers for Disease Control and Prevention (CDC) announced that it was administering an average of more than 3.3 million doses per day, down from less than 2.5 million on Monday.
The persistent reluctance of some Americans to get vaccinated and the fact that new coronavirus mutations are now spreading is leading experts to predict that collective immunity will be avoided by the United States for a long time to come. “Instead, it concludes that the virus will often become a manageable threat, which can occur in the United States for many years, still leading to hospitalization and death, to a very small extent,” the report said.
“The virus is unlikely to go away,” said Rustom Andy, an evolutionary biologist at Emory University in Georgia. “But we want to do everything we can to increase the chance that this will become a very dangerous epidemic,” he said.
More waves are coming
Experts say it is important for people, especially the elderly and groups, to continue to avoid immunizations that contain other risk factors to reduce the severity of the expected “waves” of infection. High vaccination coverage in these segments of the population may keep the balance of hospitalization and mortality relatively low even after the release of isolated measures.
The change in the thinking of the professional public is reflected in the report of government epidemiologist Anthony Fucci, who advises US President Joe Biden on the fight against Govt-19. “We have stopped using the word collective immunity in the classical sense. Forget it for a moment. If you vaccinate enough people, the infection will go down,” he said.
U.S. Polls show that about 30 percent of adults still reject or are assigned to the Covit-19 vaccine. In a recent poll by Axios, 14 percent of respondents said they would not get the vaccine, and 21 percent said they were waiting for the result.