@Zardoz @Shadowman311 My larger point was the efficacy of bacterial vaccines; if nothing else, it demonstrates that there are effective vaccines in production.
>How does it make sense to wipe out your microbiome balance to the point of opportunistic infections as a preventative for pneumonia
Someone I know had recurring sinus infections for three years. Everything reasonable was tried, including a lot of holistic medicine and some homeopathic treatments. It was likely an uncommon environmental trigger causing flare-ups leading to opportunistic infections. The decision was made to try the pneumococcal vaccine, and it successfully took care of the issue. When it comes to children, a lot of kids do have minor allergies to common environmental triggers that cause similar issues (the eternal snot nosed kid). There's a lot of good reasons to avoid chronic inflammation in general, and particularly of the ear nose and throat. Specifically it can contribute to malformation of the sinuses & airways & associated development of face, sleeping problems and the myriad of related complications, etc.