Health
Coronavirus herd immunity is more and more unlikely, says public health experts
Although the concept of herd immunity is often proposed as the key to returning to normal after living under coronavirus restriction for more than a year, public health experts have achieved herd immunity with coronavirus and It warns that it is less likely to be maintained.
“The concept of herd immunity with COVID-19 remains elusive,” said Dr. Todd Elalin, director of infectious diseases at South Shore Health. “I mean, I don’t talk about herd immunity with the flu, because I know I’ll be back next year.”
Herd immunity is a form of indirect protection from the virus when the majority of the population is immune and stops the infection. Most estimates set a threshold on approximately 70% of the population immunized by either vaccination or natural exposure to the virus.
However, even if vaccination efforts begin around the world, the true population is due to factors such as vaccine hesitation, the emergence of new variants, and delays in vaccination of children, who make up about 22% of the U.S. population. Immunity is difficult to achieve, said Dr. Davidson Hammer, an infectious disease expert at the University of Boston.
Ellerin said there are still many “unanswered questions” about the new virus.
“Will it be enough to eradicate the virus? I don’t think it’s happening. It’s very contagious and there are animal reservoirs and all these varieties,” Elerin said.
True herd immunity may be out of reach in Massachusetts, the United States, and around the world, but experts agree that vaccination plays an important role in paving the way for normality. It is unanimous.
“People should definitely be vaccinated,” Ellerin said.
As of Sunday, more than 2.5 million people in the state have been fully vaccinated, and an additional 1.6 million have been first vaccinated. Governor Charlie Baker has promised vaccinations in Massachusetts to obtain herd immunity, but public health experts have warned that it may not be enough to keep the virus away.
Massachusetts “has the lowest vaccine repellent rate in the country,” said Caitlin Riley, a spokesman for the COVID-19 Command Center.
But even if Massachusetts achieves herd immunity within its borders, there are still “great concerns” about what happens when a trip to areas with low vaccination rates is opened, Hummer said. I will.
“In some parts of the world where vaccines are scarce, there is a constant threat of virus reintroduction,” Hammer said.
Fortunately, booster shots are relatively quick and easy to manufacture as needed, and Hamer and Ellerin say they are likely to prevent a large-scale resurgence of the virus infection.
“We sincerely believe that the worst is behind us for the foreseeable future, including next fall and winter. In the future, if a COVID-19 isolate that can evade the immune system comes, we will vaccinate. We have the technology to develop much faster, “says Ellerin.
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