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Serotype-specific estimates of A) λ(t) (serotype-specific forces of infection), and B) R0 (basic reproductive number) for dengue for the periods 1969–1980 and 1993–2010 in Mueang Rayong district, Thailand. DENV-1, DENV-2, DENV-3, and DENV-4 refer to dengue virus serotypes 1–4, respectively. Although the force of infection has decreased by approximately 50%, changes in R0 have been significantly smaller.
