Fig. 3From: Asymptomatic transmission and the resurgence of Bordetella pertussisIncrease in B. pertussis incidence after switch to aP vaccination. Figure compares the incidence of B. pertussis after the switch to aP vaccination in the US (panel a) and the UK (panel b). Time since the switch is presented on the x-axis. Note the similarities in the timing of spikes in incidence after the switch to aP vaccinationBack to article page