[missedthecue]

I think it's just the speed at which it has happened though. Most children born in developed countries today receive a slew of vaccines which will provide immunity to catching those diseases for decades. It's discouraging that we're looking at shot no. 4 for the mRNA covid vaccines within a year and a half, and despite even that, infection rates are still very strong.

[_ph_]

Because corona viruses are a different kind. There have been no vaccines against them so far and we saw how strongly they mutate. Still, the 3-shot regime seems to be very effective against severe disease. They probably deliver as much protection as possible unless you have a vaccine which targets exactly the strain you are fighting. So it will be interesting how the omicron-specific vaccines will do, if they do get used for larger campaigns.