$\alpha$-N-antibodies	antibodies directed against the nucleocapsid protein
$\alpha$-RBD-antibodies	antibodies directed against the receptor binding domain
$\alpha$-S-antibodies	antibodies directed against the spike glycoprotein
CI	confidence intervals
CLIA	chemiluminescence immunoassay
CMIA	chemiluminescence-based microparticle immunoassay
Ct values	cycle threshold values
ECLIA	electrochemiluminescence-based immunoassay
LGL	Bavarian Health and Food Safety Authority
N	nucleocapsid protein
PCR	polymerase chain reaction
RBD	receptor binding domain
RR	relative risk
RT-qPCR	real-time quantitative polymerase chain reaction
S	spike glycoprotein
S1	SARS-CoV-2 S subunit 1
S2	SARS-CoV-2 S subunit 2