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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Ann Epidemiol. 2017 Dec 21;28(5):273–280. doi: 10.1016/j.annepidem.2017.12.005

Figure 1.

Figure 1

Weekly time series of P&I death rates per 10,000 population in Arizona, 1915–1921. The green line is the weekly P&I death rates. Dotted lines highlight pandemic waves. The Serfling seasonal regression model baseline (blue curve) and corresponding upper limit of the 95% confidence interval of the baseline (red curve) are also shown.