Fig. 2.

Subjective sleep during a respiratory infection and when healthy. Observed means ± SEM. Left panels show data plotted against number of nights with sickness (and matched with the same day of week for the healthy condition) and right panels show data plotted against day of week for A) difficulties falling asleep, B) sleep quality, C) restless sleep, D) sufficient sleep, E) sleep depth. See Table 2 (for the right panels) and Table 4 (for the left panels) for detailed statistics.