I've actually had this concern as well recently with all the news about the effectiveness of the vaccine against new strains and I think there may be merit to the idea that the vaccine (in its current state) is dangerous in the following context:
The main purpose of vaccines is to prevent the spread of illness at some reliable rate so that the reproduction rate of viruses falls below 1 in order to create herd immunity. However, the current Covid vaccines do not seem to stop spread very well and people who are vaccinated and infected will get more asymptomatic infections. This is a recipe for disaster in my estimation.
Viruses, like any organism that follows evolutionary principles, reproduces with variation. In a given context, the virus that can survive an environment will reproduce, and the weaker virus that cannot, will die off.
If people who are resistant to Covid due to vaccination can still be infected, then won't the fitness of the virus increase when it is cultivated in the more resistant bodies of vaccinated people (be more likely to pass on traits that evade vaccine effectiveness)?
And to make it worse, won't asymptomatic infections increase the likelihood of infected people spreading the virus to others since they won't even know they are infected (speed up the rate at which mutations can occur)?
It seems like the worst case scenario. I will admit, I am just a layperson though. Maybe the mRNA vaccines operate on different principles that prevent this from happening.
Found an article from 2015 about this actually:
https://www.washingtonpost.com/news/speaking-of-science/wp/2015/07/27/leaky-vaccines-could-make-viruses-more-deadly-new-study-suggests/and here is another one from this year regarding this subject about Covid specifically. Haven't read through it yet though:
https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30851-3/fulltext---
Kirbyhameha!!!
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