Covid vaccination started in Spain on 27th December 2021, just in between the second and third wave you can see in the graph. As you can see, the second wave was already much less deadly than the first, and that was without lockdown. And so far only 15% of the population were ever infected with Covid. So its not clear to me that these two factors had a major influence.
The second/third wave was not less deadly at all, the curve was just flatter due to non-pharmaceutical interventions. It would have far exceeded the first wave if hospitals would have been overwhelmed.
As for the 15%… that is very likely an significant underestimation as Spain AFAIK isn’t testing randomly for antibodies.
Covid vaccination started in Spain on 27th December 2021, just in between the second and third wave you can see in the graph. As you can see, the second wave was already much less deadly than the first, and that was without lockdown. And so far only 15% of the population were ever infected with Covid. So its not clear to me that these two factors had a major influence.
The second/third wave was not less deadly at all, the curve was just flatter due to non-pharmaceutical interventions. It would have far exceeded the first wave if hospitals would have been overwhelmed. As for the 15%… that is very likely an significant underestimation as Spain AFAIK isn’t testing randomly for antibodies.