Here's an interesting graph of two diseases there never was a vaccine for: typhoid and dysentery.
https://i.imgur.com/8eZpI3G.png

Notice how the mortality is steadily declining, until the diseases virtually disappear. This happens all on its own, because of better sanitation and living standards.

Here's two graphs on scarlet fever. No vaccine was ever developed for it either. Graphs from the US and UK mortality:
https://i.imgur.com/3ZA8fh3.png

Same pattern. The mortality rates go down with the increase in living standards.

Now let's look at measels:
https://i.imgur.com/2upjxTn.png

Now isn't that curios. The pattern is exactly the same as for the three other diseases we looked at.

But we're still being told we're all going to die unless everyone gets the measles vaccine.
I think we're not being told the full story.