I’m not qualified to really discuss, but here’s a study I recently heard brought up. It would be interesting to hear an unbiased opinion of someone with a medical background

“Vaccines that let the hosts survive but do not prevent the spread of the pathogen relax this selection, allowing the evolution of hotter pathogens to occur. This type of vaccine is often called a leaky vaccine.”

https://journals.plos.org/plosbiology/article?id=10.1371/jou...