D1.

Most central nodes and centrality measures for the positive sentiment network.

Positive vaccine sentiment network
Degree centrality		Betweenness centrality		Closeness centrality		Eigenvector centrality
Mean = 0.0061		Mean = 0.006		Mean = 0.2292		Mean = 0.0626
Std Dev = 0.0107		Std Dev = 0.0203		Std Dev = 0.038		Std Dev = 0.0936
vaccines	0.1079	parents	0.2718	parents	0.3687	parents	1
parents	0.0993	vaccines	0.2176	vaccines	0.3482	vaccines	0.8209
measles	0.0993	measles	0.1546	children	0.3415	measles	0.7458
vaccination	0.0856	anti-vaccination	0.1261	measles	0.3382	vaccination	0.6373
autism	0.0616	religious groups	0.1018	community	0.3227	children	0.5382
HPV vaccine	0.0565	vaccine-autism link	0.0917	religious groups	0.3219	SB 277	0.4207
vaccine-autism link	0.0531	meningococcal disease	0.0905	autism	0.3188	autism	0.4025
meningococcal disease	0.0531	children	0.0825	SB 277	0.3158	community	0.3937
anti-vaccination	0.0479	autism	0.0799	vaccine-autism link	0.3148	religious groups	0.3905
children	0.0445	HPV vaccine	0.0732	anti-vaccination	0.3121	anti-vaccination	0.3802
MMR vaccine	0.0411	community	0.0574	vaccination	0.3100	vaccine-autism link	0.3608
religious groups	0.0394	SB 277	0.0571			herd immunity	0.3058
measles vaccine	0.0377	measles vaccine	0.0523			vaccine refusal	0.3024
SB 277	0.0342	side effects	0.0510			vaccination exemption	0.3013
disease	0.0308	Gardasil	0.0496			personal belief exemption	0.2909
vaccination exemption	0.0291					disease	0.2829
autism risk	0.0291					measles vaccine	0.2706
						schools	0.2685
						HPV vaccine	0.2674
						vaccine delay	0.2603
						meningococcal disease	0.2551