Table 1.

Description of Search Terms.

S1	“Healthcare disparities” [Mesh] OR “African Americans” [Mesh] OR “Hispanic Americans” [Mesh] OR “Minority groups” [Mesh] OR “Ethnic groups” [Mesh] OR “Minority health” [Mesh] OR “Continental population groups” [Mesh] OR “Health promotion” [Mesh] OR “Health knowledge, attitudes, practice” [Mesh] OR “Health surveys” [Mesh] OR “Health care surveys” [Mesh]
S2	“Mass vaccination” [Mesh]) OR “Immunization” [Mesh]) OR “Vaccination” [Mesh]
S3	“Middle aged” [Mesh] OR “Aged” [Mesh] OR “Adult” [Mesh]
S4	United States
S5	S1 and S2 and S3 and S4