>>24
>>25
unlikely because vaccines always work ;)
though some are likely to jump to crazy conclusions it is normal for some types of vaccinations to not last a lifetime
ive not studied this particular issue but if it really was mumps and they really had two shots and the latter one was viable then it is possible either they are outliers that dont respond as normal immune system do to the vaccine or that pathogen has mutated
rather than intentional malevolence it is most likely that something went wrong with the second vaccine delivery, there is reason you get it more than once
chances are they might not even have mumps and this is fearmongering
This is a type of Single stranded RNA virus and there are several known genotypes so a new one is not out of the question
extra treading below:
In regard to the current measles outbreak, some people are saying that children who have not had the vaccine should pose no threat to vaccinated people. It is my understanding that during an outbreak, vaccinated people can still contract it. Am I correct?
You are correct that vaccinated people can still be infected with infections against which they are vaccinated. No vaccine is 100% effective. Vaccine effectiveness varies from greater than 95% (for diseases such as measles, rubella, hepatitis B) to much lower (influenza this year 23%, and 60% in years with a good match of wild and vaccine viruses, and the acellular pertussis vaccines after 5 years or so provide only about 70% protection). Therefore, we encourage as many people as possible to be vaccinated, to avoid outbreaks, while working towards the development of better vaccines (such as for influenza and pertussis).
Why is a second dose of MMR necessary?
Between 2% and 5% of people do not develop measles immunity after the first dose of vaccine. This occurs for a variety of reasons. The second dose is to provide another chance to develop measles immunity for people who did not respond to the first dose.