Table 3.

Serious adverse events^a.

SAE category	Total	CPb	Control
(Prolongation of) hospital admission—no.c	80	37	43
Death—no.	3	1	2
Serious transfusion related adverse event—no.d	4	1	3
Life threatening transfusion reaction—no.e	2	0	2
Other AE	2	1	1

^aSerious adverse events (SAE) were registered in all patients that signed the informed consent form (n = 797) regardless of being transfused or not.

^bConvalescent plasma.

^cWhen a patient is hospitalized more than once, each admission is counted separately.

^dAny transfusion reaction associated with a plasma transfusion that was considered as a SAE.

^e2 patients with anaphylaxis very soon after discharge that required urgent therapy by paramedics.