Loneliness
Anxiety
UCLA Loneliness Scale
Psychosocial
Depression (economics)
Psychology
Clinical psychology
Dyad
Coronavirus disease 2019 (COVID-19)
Scale (ratio)
Mental health
Gerontology
Psychiatry
Medicine
Disease
Developmental psychology
Physics
Pathology
Quantum mechanics
Infectious disease (medical specialty)
Economics
Macroeconomics
