Is my translation incomplete, or did that German study use a test with unreported sensitivity (but >99% specificity)? 15% could be closer to a lower bound, if so.
On top of that, other research indicates some folks might be recovering without developing antibodies at all (they could be clearing the infection with only their innate immune systems). In that case we couldn't be totally sure about the upper bound anytime soon:
On top of that, other research indicates some folks might be recovering without developing antibodies at all (they could be clearing the infection with only their innate immune systems). In that case we couldn't be totally sure about the upper bound anytime soon:
https://www.medrxiv.org/content/10.1101/2020.03.30.20047365v...
https://en.wikipedia.org/wiki/Innate_immune_system