[sgt101]

>In the US, 33-50% of the population apparently had antibodies pre-vaccination

Where did that number come from?

I have read more like 8% (https://www.thelancet.com/article/S0140-6736(20)32009-2/full...)

So - 2 to 3x... Nope. 8 - 10x.

What I want to know is why you have constructed this belief and want to propagate it when it is refuted by a google search in 10 seconds flat?

[wk_end]

Your article is from last September, using data from last July. It only takes ten seconds to google, but I guess it takes a few more to check timestamps or think critically about the results.

Using more current antibody data, the CDC released updated estimates yesterday [0] that there have been ~115 million actual COVID infections in the US. That makes the 2x-3x number pretty reasonable (especially since herd immunity is supposed to kick in around 70%).

[0] https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burd...

[maxerickson]

I wonder if the theory that previously infected people are reacting more strongly to the first doses is true?

I had no real reaction to the first one and a day of increased fatigue so far with the second.

Anecdotally, many more people are having stronger reactions to the second.