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This is a good description of the effect: "herd immunity [...] leads to the reduction of transmission of an infection in a population. The term is sometimes used in a "qualitative" sense, i.e. it indicates the presence of sufficient immune individuals in a population (above a specified threshold) which leads to the disappearance of the infection." If enough people in a population have the vaccine, then the pathogen disappears because it has nowhere to incubate and mutate. Over 95% of the total must be vaccinated for Herd Immunity take effect. There isn't much wiggle room before gaping holes start appearing in the defense grid. But let's start poking holes in this defensive wall. The more people who are allowed to opt OUT of the system for any old reason, regardless of legitimacy, the more opportunities the virus now has for entering a body that's not protected. It's no longer facing a giant wall of vaccinated people protecting a few people with compromised immune systems. It can now more easily incubate, replicate, and mutate. Here's a graphic to help you understand the problem. (t) represents successive time periods and an unvaccinated population. The infection hits a target which is open, unprotected by the wall. It moves from that individual to other unprotected individuals, increasing exponentially. In a population with giant gaps or unvaccinated people, disease transmits quickly. ![]() This is an image describing what happens when we introduce immune individuals into the situation. It interrupts, inhibits, and slows down the rate of infection and the spread of the disease. We can see that some of the individuals who are still vulnerable are protected in the line of transmission if it first hits someone who is immune. If that person had NOT been immune, it would have continued on the path infected another one who would have infected another three, each infected yet another three. ![]() Disease transmission can be described mathematically, the number of infections cases and spreads are a function of the base of vulnerable individuals. This means that then that the availability of bodies without protection fuels the number of cases and the rate of transmission. The more people who are not vaccinated, the more people who will get sick in case of outbreak and the faster it will happen. This is called the "Mass Action Principle." Now, a further problem from allowing wanton evasion of vaccinations is not only that it spreads it to those who are not vaccinated (for whatever reason (health, too young, w/e). It can also infect people who have the vaccine, but have compromised immune systems. There have been cases of people dying or getting sick because a large enough group of people around them were susceptible, so the disease bounced from multiple infected to the uninfected, overloading the immune system. Furthermore, bodies act as incubators, as I explained earlier. These "holes" in the defense network give the disease time to mutate so it can then infect the vaccinated populations with a new strain. If you were vaccinated, the chances of that happening would go down tremendously, and if enough were vaccinated, the disease would disappear (as many have since mass vaccination). Only recently are new strains coming back...because tards aren't getting vaccinations. Measles is one example. This is because in all sectors of a given population (not just the total), a type of critical point must be had wherein a large enough group of the population is vaccinated. For example, in order to achieve herd immunity disease eradication for Malaria 80-99% of any segment of the population must be immune. For Pertussis, it's 92-94%. For smallpox, it's 85%. Remember, this is in any given sample, not just the national level. In fact, vaccinations can lead to problems if there isn't a high enough quantity of people who are vaccinated, as it can increase the disease burden among adults. This means that the vaccination can actually be harmful if you are not assured that the vast majority of people will get it. Thus the more people who let through the system, not only does it make the defense weaker, it increases the risk for specific groups. (For a source on this, see here: http://www.pitt.edu/~super1/lecture/lec1181/028.htm). This is also an excellent article that describes the danger of half-assed vaccination programmes, with implications for what happens when you don't vaccinate enough people or allow people to avoid them. Read it. You'll learn something. Vaccination policies: individual rights v community health In 1993, there was a huge outbreak of Rubella in Greece because they didn't, unlike other countries, have an effective vaccination mandate and the number of people who were protected was low. Mind you, in the United States when it was applied, it reduced the cases of congenital rubella from 20,000 to 7. The article goes into some detail about Herd Immunity and why letting people opt out harms the community by decrease Herd Immunity. Quote:
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Last edited by Technocratic_Utilitarian : 06-25-2008 at 01:04 PM. |
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A panda walks into a cafe. He orders a sandwich, eats it, then draws a gun and fires two shots in the air. "Why?" asks the confused waiter, as the panda makes toward the exit. The panda produces a badly punctuated wildlife manual and tosses it over his shoulder. "I'm a panda," he says at the door. "Look it up." The waiter turns to the relevant entry and, sure enough, finds an explanation. "Panda. Large black-and-white bear-like mammal, native to China. Eats, shoots and leaves." |
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Non concupisces domum proximi tui; nec desiderabis uxorem eius, non servum, non ancillam, non bowem, non asinum, nec omnia quae illius sunt. |
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A panda walks into a cafe. He orders a sandwich, eats it, then draws a gun and fires two shots in the air. "Why?" asks the confused waiter, as the panda makes toward the exit. The panda produces a badly punctuated wildlife manual and tosses it over his shoulder. "I'm a panda," he says at the door. "Look it up." The waiter turns to the relevant entry and, sure enough, finds an explanation. "Panda. Large black-and-white bear-like mammal, native to China. Eats, shoots and leaves." |
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A panda walks into a cafe. He orders a sandwich, eats it, then draws a gun and fires two shots in the air. "Why?" asks the confused waiter, as the panda makes toward the exit. The panda produces a badly punctuated wildlife manual and tosses it over his shoulder. "I'm a panda," he says at the door. "Look it up." The waiter turns to the relevant entry and, sure enough, finds an explanation. "Panda. Large black-and-white bear-like mammal, native to China. Eats, shoots and leaves." |
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You're argument wasn't rational. It was merely an attempt to poison the well by making an emotional, yet fallacious comparison to Hitler when the situations weren't even remotely similar.
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I trust you understand this, thus I needn't explain something so elementary to you again.
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Non concupisces domum proximi tui; nec desiderabis uxorem eius, non servum, non ancillam, non bowem, non asinum, nec omnia quae illius sunt. |
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