This discussion is too interesting to pass up.
I agree with OR's assertion that people shouldn't blindly follow experts but should instead research and then make up their own minds. I also believe Marvin is correct in that most people aren't well suited to do so either by nature or due to lack of proper training. OTOH, I know that OR is more than capable of researching and making her own decisions and I applaud her for doing so.
The article Marvin posted is quite interesting. I believe that it proves OR's point about the virus she declined. The article describes not one but two similar but slightly different vaccines for rotovirus, the RRV-TV that OR declined and a second vaccine, PRV, that was being developed at the time RRV-TV was removed from use.
Some relevant sections of the article.
However, postmarketing surveillance studies detected a temporal association between RRV-TV and intestinal intussusception, the telescoping or prolapse of one portion of the bowel into an immediately adjacent segment. Intussusception is an uncommon illness with a background incidence of 18–56 cases per 100 000 infant years during the first year of life in the US [4]. The population attributable risk detected in the postmarketing studies for RRV-TV was approximately 1 additional case per 10 000 vaccine recipients [5–8]. No association between RRV-TV and intussusception was observed in clinical studies conducted prelicensure [9].
This section states that no problems related to intussusception were found during development of the RRV-TV but after it was released they found the prevalence of intussusception in those receiving the vaccination was approximately 1 additional case per 10000 recipients as opposed to those who didn't receive the vaccination. 1 in 10000 doesn't sound like a lot but it was enough to justify discontinuing the vaccine and it is enough to justify OR's decision to pass on the vaccine.
A decision was made to continue the PRV program because of the importance of a safe and effective rotavirus vaccine to public health [15–17]. The absence of an apparent association between wild-type human rotavirus disease and intussusception indicated that intussusception would not necessarily be associated with all rotavirus vaccines [9,18]. Furthermore, preclinical data suggested that there might be some biological differences between PRV and RRV-TV [19, Merck unpublished data]. However, evaluation of the safety of the vaccine with respect to intussusception became a critical question in the clinical development plan, and a large-scale prelicensure safety study was deemed necessary.
This section states that the developers of the PRV were concerned about the issues with the RRV-TV but decided to continue development of the PRV because they felt a rotovirus vaccine was still needed and that they believed there might be enough difference between the RRV-TV and the PRV for the PRV to work without causing an increased risk of intussusception but they decided to do a much more thorough pre-release safety study.
Based on the previous experience with RRV-TV, we designed a study of PRV in which the age and timing at which intussusception occurred with RRV-TV was covered. Had the prelicensure studies of RRV-TV been conducted using a similar design, it is likely (≥85%) the studies of RRV-TV would have been stopped due to a safety concern, based on the safety boundaries, as was shown by the simulation results.
This section from the Conclusions is the scary part. This section basically states that the RRV-TV probably wouldn't have been released if the pre-release studies had been more thorough. A lot of Covid-19 vaccines are currently being rapidly developed. It's possible that we could end up reading a similar statement in a similar study in a few years about a Covid-19 vaccine that was quickly developed and released and later found to introduce an unacceptable risk of causing harm.
I believe I understand what a vaccine is and what it does and I know that there is a small amount of risk associated with receiving a vaccine. If the vaccine is properly tested the risk is reduced to an acceptable level so that the benefits of the vaccine outweigh the risks for both the individual and the community but it is still possible that some people who receive the vaccine may be harmed. The antigens that trigger the immune response and the adjuvents that improve the immune system's response to the antigens aren't the only components found in a vaccine. There are other ingredients that are part of the delivery system and some people have sensitivites or alllergies to some of these components.
None of this should be interpreted as meaning that I am against vaccines. I believe we are fortunate to have them and I have received more than my share. When I was in the Air Force I received enough vaccinations to fill a couple of pages in my immunization record book. I received a full series of rabies shots after a close encounter with a bat and as a healthcare worker I had to have a series of shots for Hepatitis B. I also usually get a yearly influenza vaccine but I normally wait until they've been administering them for a month or two in case there are any unexpected reactions since the vaccine is updated every year. Once a vaccine for Covid-19 is released I will do my research and then I will decide if and when I get the vaccination.
My graduate degree is in Information Science. I was trained to critically evaluate information sources, including experts. I believe all high school and college students should be trained to evaluate the information they are accessing and I wrote and taught an information research and evaluation course for college students that was pretty popular.
If you've managed to read this far, Mr. SmartyPants and I thank you for your time and interest.