Health
What is flock immunity? Why do anyone think that it can end a coronavirus pandemic?
It’s a sequel.
The concept of herd immunity is simple. But are you achieving that? Not so many. Because of the pandemic of coronaviruses worldwide, doctors, scientists, and government leaders alike also say that the spread of the virus is less threatening if collective immunity is achieved. Immunity of a population is achieved because the majority (70-90%) of a given population has become infected and recovered, or when vaccination becomes immune to an infectious disease. When that happens, the disease is less likely to spread to people without immunity, because there are not enough infectious carriers to reach them. There are only two ways to get there: Widespread vaccination for COVID-19 is a widespread infection that is still months away or leads to immunity. Collective immunity from infection is not without riskAlthough most doctors and specialists may allow COVID-19 to exterminate the population, it may help to quickly reach herd immunity. I also agree to overwhelm the hospital. More people will die not only from coronaviruses, but also from other infections. That is why we are all stuck at home. We are flattening the curve. . Cody Meissner, who is responsible for childhood infections at Tufts University School of Medicine, told CNN. Maria van Kerkov, an infectious disease epidemiologist at the World Health Organization, said it’s unclear whether people exposed to the virus will get the virus completely, and if so for how long. . So the government said it should wait for the vaccine. “WHO have seen some preliminary results, some preliminary studies, and pre-published results and some people have an immune response,” Wankerhoff said. “I don’t know if it really gives immunity, which means that the immunity is fully protected,” she added, the vaccine is a better answer. “That means more than 130 developers, scientists, and companies have come together these days, and they’re willing to work with us on a global scale to drive vaccines.” “And it’s much less likely that young people will die of COVID-19, but they can be sick enough to require hospitalization.” COVID-19 was caught once Even if people alone become more immune to future infections, it is enough to approach widespread immunity in the United States: “The level of infected people, which protects our herd immunity. I don’t think it’s going to give you a level, “said Dr. Anthony Forch, National Institute of Allergy and Infectious Diseases, told CNN Jim Skuit on Tuesday. “What that means, it will protect exposed people, but at the community level, there would not have been enough infectious diseases to really have enough herd’s immune umbrella.” Told. Since no vaccine has been created for the new coronavirus, some countries have completely forgotten the lockdown, keeping vulnerable places indoors and allowing others to live their normal lives. Insist that you should achieve immunity and infect. While Boris Johnson seemed to have upheld similar beliefs when he postponed a massive rally ban and school closure in March, Johnson later issued a national home order, effectively It closed all unnecessary businesses and banned public gatherings. Then he himself got a virus and stayed at ICU for 3 nights. He was then discharged from the hospital. Why Sweden Refuses Lockdown While most of Europe has moved to lockdown, one country is defeating the trend: Sweden. Scandinavian country restaurants, schools and playgrounds are open. Swedish Foreign Minister Anlinde said he was relying on the public to be responsible for voluntarily preventing the spread of coronaviruses, rather than following the herd’s immunological theory. Argued that herd immunity could reach people in the capital city, Stockholm, within a few weeks. “In much of Sweden, around Stockholm, we have reached the plateau (in new cases) and have already seen the effects of herd immunity, and in a few weeks details of that effect,” Tegner said in an interview with CNBC. Said. The strategy didn’t come without cost. The WHO said that it is “essential” for Sweden to take stronger steps to control the spread of the virus. Swedish “curves” -infection rates and deaths caused by coronavirus-are steeper compared to other European countries that have not taken more stringent measures. According to data from the Johns Hopkins University, Sweden reported at least 1,937 coronavirus-related deaths as of Wednesday, compared to 185 deaths in Norway and 149 in Finland. Promoting antibody testing It is difficult to identify situations in the United States that have not been extensively tested today. That’s why so many people are eager for antibody testing. Tests aimed at detecting coronavirus infection at the touch of a finger can help public health officials determine which parts of the population are infected. Anyway the theory has at least some immunity to the virus, Caroline Bucky, an associate professor of epidemiology at Harvard University, said at the Chan School of Public Health. In one town in California, people are already being tested for antibodies. New York Governor Andrew Cuomo said his most hit state in the United States will begin large-scale antibody testing next week. “This will be the first true snapshot of what we’re dealing with,” said Cuomo, but scientists and doctors are on the market as many haven’t been reviewed by the FDA. I’m skeptical about the reliability of ten tests. Moreover, even approved tests are not 100% accurate. Antibodies may not be detected early in infection, leading to false negatives.
It’s a sequel.
The concept of herd immunity is simple. But are you achieving that? Not so much.
As the coronavirus pandemic spreads around the world, doctors, scientists, and government leaders alike say that the spread of the virus is less of a threat if herd immunity is achieved.
Population immunity is reached because the majority (70-90%) of a given population has become infected and recovered, or when vaccination becomes immune to an infectious disease. When that happens, the disease is less likely to spread to people who are not immune because there are not enough infectious carriers to reach them.
There are only two ways to get there. COVID-19 is a widespread vaccination that is still months away, or a widespread infectious disease that leads to immunity.
Immunity of a herd due to infection is not without risk
Most doctors and experts also agree that allowing COVID-19 to exterminate the population may help quickly reach the herd’s immunity, but it also overwhelms the hospital. . More people will die not only from coronaviruses, but also from other infections. That is why we are all stuck at home. The curve is flattened.
“The benefit of increasing the number of cases is that the hospital does not exceed its capacity to treat particularly ill patients,” Dr. H. Cordymeisner, head of childhood infections at Tufts University School of Medicine, told CNN. .
And there is the problem that we really don’t know how immunity works with this virus.
Dr Maria Van Kerkov, an infectious disease epidemiologist at the World Health Organization, said it’s unclear whether people exposed to the virus would be fully immune to it, and if so, for how long. It was That’s why the government should wait for a vaccine, she said.
“The WHO is looking at some preliminary results, some preliminary studies, and prepublished results, and some people will develop an immune response,” Van Kerhof said. . “I don’t know if it really gives immunity, which means it’s fully protected.”
She added that the vaccine was a better answer. “That means more than 130 developers, scientists, and companies have come together these days, and they’re willing to work with us on a global scale to drive vaccines.” It is a promotion and the whole world is waiting. “
Also, young people are much less likely to die from COVID-19, but can be ill enough to require hospitalization.
Even if COVID-19 was caught all at once and people became immune to future infections, the United States did not have enough cases to approach widespread immunity.
“I don’t think we’ll reach the level of infected people, the level at which we provide the immune protection of our herd,” said Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases. Jim Squirt from CNN on Tuesday.
“It means that it would protect exposed people, but at the community level, there would not have been enough infectious diseases to really have enough herd’s immune umbrella,” Fotti said. Said.
As No vaccine has been created for the new coronavirus, Some states have argued that the blockade should be completely forgotten and placed in vulnerable indoors to allow others to lead normal lives and to develop and infect the herd’s immunity.
British Prime Minister Boris Johnson seems to have upheld similar beliefs when he postponed a massive ban on rallies and school closures in March.
However, Johnson later issued a national home order, effectively shutting down all unnecessary businesses and banning public gatherings. Then he himself got a virus and stayed at ICU for 3 nights. Then he was discharged.
Why Sweden refuses lockdown
While much of Europe fell into blockade, Sweden went against that trend.
Scandinavian country restaurants, schools and playgrounds are open. Swedish Foreign Minister Anlinde said he was relying on the public to be responsible for voluntarily preventing the spread of coronaviruses, rather than following herd immune theory.
However, Swedish national epidemiologist Anderstengner claimed that herd immunity could be reached within a few weeks in the country’s capital, Stockholm.
“Around Sweden, a major region of Sweden, we have reached a plateau (in new cases) and we have already seen the effects of herd immunity, and we’ll see more in a few weeks.” Is Interview with CNBC.
Strategies are expensive.
The WHO states that it is “mandatory” for Sweden to take stronger steps to control the spread of the virus.
Sweden’s “curve” -the proportion of infections and deaths caused by coronaviruses-is steeper when compared to other European countries, which have not taken stricter measures. According to data from the Johns Hopkins University, Sweden reported at least 1937 coronavirus-related deaths as of Wednesday, compared with 185 in Norway and 149 in Finland.
Promotion of antibody testing
Without extensive testing, it’s hard to tell where the United States stands now. That is why many people are strongly demanding antibody testing.
Tests aimed at detecting coronavirus infection at the touch of a finger help public health officials to theoretically determine which part of the population is infected. Caroline Bucky, an associate professor of epidemiology at Harvard University, said Chan Public Health School.
A city in California has already begun testing the population for antibodies. New York Governor Andrew Cuomo said his most hit state in the United States will begin large-scale antibody testing next week.
“This will be the first true snapshot we’re dealing with,” said Cuomo.
However, scientists and doctors are skeptical about the reliability of dozens of tests on the market, because many have not been reviewed by the FDA.
Moreover, even approved tests are not 100% accurate.
The FDA has also warned that the test may lead to false negatives as antibodies may not be detected early in the infection.
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