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Fig. 5 | BMC Medicine

Fig. 5

From: Asymptomatic transmission and the resurgence of Bordetella pertussis

Fig. 5

Comparing disease-free weeks in pre- and post-vaccination scenarios. Panel a shows the proportion of disease-free weeks (fade-outs) per year for the 50 US states in the pre-vaccine (1920–1945, black points and line) and post-vaccine (2006–2013, blue points and line) eras. Lines indicate best-fit exponential curves. Panel b shows the mean duration of consecutive disease-free weeks in both eras

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