Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Estimates of the amplitude (α) of seasonality of measles transmission, from 1904 to 1965, based on 9-year time windows around each year (details in §3.2.2). The measles incidence data after 1970 (after mass vaccination was in full force) is much noisier and estimating α is much more difficult. We assume α remained roughly constant after the final point shown in the graph. (Online version in colour.)
