One of my favorite tropes (of so many) of the vaccine denier gang is that vaccines are not effective, thereby implying that the limited usefulness is not worth the risks of vaccines, real or imagined. But the fact is vaccines do save lives in measurable and sometimes fascinating ways. Two peer reviewed papers, recently published, provided clear evidence of some of the ways vaccines directly save lives.
The first article analyzed the relationship between flu vaccines and reduction of cardiovascular events; while the second one examined how vaccines might reduce morbidity and mortality from pneumococcal meningitis.
Now, the study does not show that the flu vaccine has some miraculous anti-heart attack component, it might reduce the risk of catching the flu, or possibly reducing the severity of the infection, which reduces the risk of having a heart attack. In fact, the study’s original hypothesis was that catching the flu might actually increase the risk of a cardiovascular event, specifically a heart attack.
Furthermore, the researchers observed that the flu vaccine reduced heart attack risk even when the vaccine’s effectiveness was shown to be not very high. This conclusion itself debunks one of the huge myths of the antivaccination crowd (which is essentially that if it’s not 100% effective then we must conclude that it’s 0% effective, an application of the Nirvana logical fallacy); sometimes even when a vaccine isn’t completely effective, it still has some net positive effects. Continue reading “Vaccines save lives–even more evidence”
In this blog, I have spent an inordinate amount of time refuting claims from vaccine deniers about the effectiveness of vaccines (along with debunking claims about safety). Even if the safety claims were legitimate, and they are not, in general, even close to being legitimate, the antivaccinationists give disproportionate weight to the adverse events over the actual benefits of the vaccination. For example, I just reviewedan article about non-medical exemptions to vaccinations, in which the authors concluded that, “the past several decades have seen a shift in parental concerns from disease prevention to vaccination risks, largely and paradoxically because of the success of large scale immunization.”
A recent study, published in the journal Vaccine, provided evidence that the new 13-valent pneumococcal conjugate vaccine (PCV13) is as safe as the previous version, the 7-valent pneumococcal conjugate vaccine (PCV7). The newer version of the vaccine, introduced in 2010 after clinical trials, protects against a broader range of pneumococcus (Streptococcus pneumoniae, a significant human pathogenic bacterium) subtypes. These studies show that the new version did not increase the risk for any serious adverse events related to the vaccine.
Pneumococcal disease is a serious health care issue, especially for children and adults with certain risk factors. Pneumococcal disease can lead to various serious diseases like pneumonia and bacterial meningitis, or less serious ones like otitis media. Unfortunately, pneumococcal disease can be fatal. In some cases, it can result in long-term problems, like brain damage, hearing loss, and limb loss. Continue reading “New 13-valent pneumococcal vaccine is safe”