Antibody testing is getting tricky now, because antibodies are starting to fade, so unfortunately seroprevalence numbers will become underestimates with time.

Antibody testing is getting tricky now, because antibodies are starting to fade, so unfortunately seroprevalence numbers will become underestimates with time. That being said, in one hard-hit area of Stockholm, seroprevalence was 19% (https://www.folkhalsomyndigheten.se/publicerat-material/publikationsarkiv/f/forekomsten-av-antikroppar-mot-sars-cov-2-i-stadsdelen-rinkeby-kista-stockholm-2224-juni-2020/ https://www.folkhalsomyndigheten.se/publicerat-material/publ...). Stockholm as a whole has about 11% seroprevalence in their most recent numbers, but again, I believe antibodies are starting to fade now (https://www.folkhalsomyndigheten.se/publicerat-material/publikationsarkiv/p/pavisning-av-antikroppar-efter-genomgangen-covid-19-hos-blodgivare-delrapport-2/ https://www.folkhalsomyndigheten.se/publicerat-material/publ...).