Table 1.

Background characteristics and baseline measures

	Vaccine (n=13)	Placebo (n=13)
Men/Women	3/10	3/10
Age (years)	29.4±5.8	25.6±4.3
Financial strain	12.8±3.5	12.6±3.0
Work demands	64.1±16.6	57.7±8.9
Vigour	12.5±5.8	12.3±5.2
Tension–anxiety	2.8±1.6	3.7±2.6
Depression–dejection	0.7±1.2	0.9±1.4
Confusion	3.2±2.4	4.1±2.6
Fatigue	0.4±0.3	1.0±0.9
Symptoms	0.5±0.8	0.7±1.1
Body temperature (°C)	36.2±0.5	36.4±0.4
Heart rate (bpm)	71.5±11.7	78.0±9.6
Systolic pressure (mm Hg)	119.5±18.2	120.4±14.4
Diastolic pressure (mm Hg)	75.7±11.4	70.5±6.1