Nearly all vaccines present some risk and will harm a small proportion of people. These proportions are well understood (look up NNT & NNH) and are fundamental to decisions whether to recommend a vaccine be rolled out. The precise balance of risk / benefit varies for different vaccines and it is also right that the seriousness of the condition being protected against is taken into consideration. So for example, we should be prepared to accept a higher level of risk for a smallpox vaccine compared to a chickenpox vaccine.
The reasons why an individual child might might be harmed will not always be known - almost every medical intervention carries some risk to some individuals, often due to genetic differences. Even if these risks can be quantified at a population level they cannot be entirely removed at the level of the individual. You ask for the risks to be āfollowed upā - as if researchers are not trying to develop the safest vaccines they can. Thankfully, any Pharma company that develops a replacement vaccine that is safer and more effective will get market share - thousands of research scientists spend their working lives trying to work out why harm sometimes results and how to do better.
It is also the case though, that it is rarely possible to attribute a particular individual illness to a vaccine even if there is a known risk at a population level. People often think they can spot serious harm caused by vaccines to an individual, they are almost always wrong - you need very big sample sizes to detect harm from such safe interventions.
There are thousands of parents whose kids had MMR and then developed Autism; they believe that MMR caused Autism but they are (to a reasonable degree of certainty) utterly and totally wrong - this is just a proximity bias, our brains are hard wired to miss-attribute causality in this way. They deserve compassion not ridicule, but their miss-perception should not be used as the basis for an argument to undermine one of the best Public Health measures available. It is just a co-incidence that MMR tends to be given at a similar age when Autism gets diagnosed, there are now dozens of high quality studies showing there is no causal relationship at all. The parents are wrong and Andrew Wakefield is no long able to practice medicine.
Many vaccines will harm a few people, but a vaccine is only made available for general usage if the evidence is robust that the benefits far outweigh the harms. These are not just āslighlyā effective interventions, taken as a whole they are massively beneficial and the risks of harm small and exceedingly rare.
Even though some people are harmed by vaccines, the net level of harm is greatly reduced if more people are vaccinated rather than less. The problem is that this is a hard concept for many people to grasp, it seems paradoxical. Nudged by rumors and paranoia, they latch onto the first few words of that sentence and conclude āif some people are harmed there is no way I will give that to my childā.
The other complexity is that there is a tension between the individual and collective good. Your best option is to make sure everyone else vaccinates their children but not have your own children vaccinated. Then, you avoid the tiny risks of harm that vaccination entails, but avoid all the horrible diseases that cannot spread due to herd immunity. Where this falls apart, of course is when everyone else follows the same strategy - herd immunity collapses and your own child becomes vulnerable. This is what is happening, right now.
This is a bogus health scare, spreading fear and leaving disease in itās wake. If a neighbors child had Polio, few informed people would choose not to vaccinate.
The only thing standing in the way of wiping out polio is anti-vax rhetoric, now narrowed to a particularly virulent form spread by religious leaders in some rural corners of Africa and Asia. Itās the same rubbish as you will find in Seattle though.
There is no conspiracy, an understanding of vaccination is available if you do the research and the anti-vaccination movement is ignorant, selfish, paranoid nonsense. Of course otherwise thoughtful, sensible, caring and considered people can at times can drawn into irrationality so ridicule is not the best way to respond and I donāt mean those words as a personal attack!
Take care (and vaccinate your kidsā¦)
R