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. 2021 Aug 18;42(3):266–272. doi: 10.1177/03331024211038654

Figure 2.

Figure 2.

Proportion of time of onset and duration of post-vaccination headaches.(a) Onset of post-vaccination headaches. Blue: ≥48 h, Green: ≥24 to <48 h, Yellow: ≥12 to <24 h, Orange: ≥6 to <12 h, Magenta: <6 h. Numbers on the top of the graph represent the number of participants in each group.

(b) Duration of post-vaccination headaches. Pink: ≥24 h, Blue: ≥12 to <24 h, Green: ≥4 to <12 h, Yellow: ≥2 to <4 h, Orange: <2 h. Numbers on the top of the graph represent the number of participants in each group.

Healthy: healthy control; non-migraine: non-migrainous headache.