Vaccine deniers, especially in the USA, use the passive data from the Vaccine Adverse Event Reporting System (VAERS), a system where individuals can report supposed adverse events post-vaccination, to “prove” certain adverse events. The data is considered to be “passive” because the individual reports can be made online, by fax or by mail–real causal events may be underreported and hyped, imaginary issues with no causality, can be over-reported. However, without medical investigations of causality between the vaccination and the claimed adverse events that are reported to the VAERS database, the data have no real value.
Furthermore, there is a background rate for mortality (death) or morbidity (abnormal medical condition), across all causes, irrespective of whether an individual is vaccinated or not, and unless you understand the background rate, the vaccine “mortality” rate has no scientific meaning. In fact, we could provide data that shows anything might cause any adverse medical event, like playing video games leads to prostate cancer, but we would have no evidence of any type of causality whatsoever. Continue reading “Reports of vaccine related effects can be useful”
Rotavirus is a virus that causes gastroenteritis, an inflammation of the stomach and intestines. Rotavirus causes severe watery diarrhea, often with vomiting, fever, and abdominal pain. In babies and young children, it can lead to dehydration (loss of body fluids). Globally, it causes more than a half a million deaths each year in children younger than 5 years of age.
If you spend any time reading the antivaccination rants, you will hear about all kinds of conspiracy theories, pseudoscience, and scaremongering. Given that there is little scientific evidence that supports their beliefs, they have little choice but invent strawman arguments to make their point. One of the more amusing strategies of antivaccine cult is to claim that diseases were going away before vaccinations. These people believe, without any evidence whatsoever, that diseases like polio, measles, and chickenpox were disappearing because of better sanitation. Or better nutrition. Or something other than what really ended these diseases–vaccines. It’s a historical revisionism of a legendary level.
Admittedly, part of this belief is that people lack the cultural memory of some of these diseases. Few parents born after 1970 would remember classmates who had been stricken with polio. Few would have remember measles, mumps, or other epidemics sweeping through a school. They just don’t remember it, because vaccines introduced in the 50’s and 60’s reduced, and in the case of smallpox, eliminated the disease. Of course, there is evidence that support the theory that vaccines end diseases. But we don’t have to go back 40 or 50 years to show this happens, but we can talk about a disease that has been drastically reduced in the last few years, just because of a new vaccine.