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.
(a) Impact of shared contacts, F, on the effect of opinion clustering, Δ. Results are shown for different local thresholds: T = 0.1 (circles), T = 0.2 (crosses), T = unlimited (triangles). (b) Impact of amount of agreement between parents; c = 80 per cent and β is varied. Shown is the probability of an outbreak for F = 0.2 (grey) and F = 1 (black) and for agreement between parents of 0.68 (i.e. random vaccination, solid line), 0.75 (triangles) and 0.85 (circles); T = 0.2.
