Acute HIV infection syndrome mimicking COVID-19 vaccination side effects: a case report

Table 1 Stages of HIV markers/ diagnostic tests in early infection, as described by Fiebig et al.

Fiebig stage	HIV-PCR	4th-generation screening test	Western blot	p24- antigen	Antibodies	Days since infection
Eclipse	−	−	−	−	−	0–11
I	+	−	−	−	−	12–16
II	+	+	−	+	−	17–21
III	+	+	−	+	HIV-IgM: +	22–24
IV	+	+	inconclusive	+ / −	2/3 antibodies positive (p24, gp41, gp120)	25–30
V	+	+	+	+ / −	3/3 antibodies positive (p24, gp41, gp120) lacking p31	31–100
VI	+	+	+	+ / −	3/3 antibodies positive (p24, gp41, gp120), p31-antibodies positive	Open-ended

The table is as described by Fiebig et al., modified after [1, 4, 5]. Results of diagnostic tests (HIV-PCR, fourth-generation screening tests, Western blot) and detectability of HIV markers (p24-antigen, HIV-specific antibodies) are shown in relation to days since infection. (+) indicates positive test result/ detectability, (−) indicates negative test result/ HIV-marker not detectable. Eclipse and Fiebig stages are listed in dependence of HIV-marker, as described by Fiebig et al.

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