AVE	Average variance extracted
CBS	Conspiracy beliefs scale
CFA	Confirmatory factor analysis
CFI	Comparative fit index
COVID-19	Coronavirus disease 2019
CR	Composite reliability
DWLS	Diagonally weighted least squares
EFA	Exploratory factor analysis
HBM	Health belief model
HIV	Human immunodeficiency virus
KMO	Kaiser–Meyer–Olkin
M	Mean
MMR	Measles, mumps, and rubella
Mpox	Monkeypox
RMSEA	Square root of the mean error of approximation
SARS-CoV-2	Severe acute respiratory syndrome coronavirus 2
SD	Standard deviation
SRMR	Square root of the standardized mean residuals
T1	Study 1—December 2020
T2	Study 2—May 2021
TBP	Theory of planned behavior
TLI	Tucker–Lewis Index
UK	United Kingdom