| Sources of data | Keyword |
| Pubmed | “mental health” AND “COVID-19” AND “healthcare workers” |
| “mental health” AND “COVID-19” AND “community people” | |
| “mental health” OR “Stress” OR “Depression” AND “COVID-19” | |
| “mental health” AND “SARS-CoV-2” AND “healthcare workers” | |
| Science Direct | “mental health” AND “COVID-19” AND “healthcare workers” |
| “mental health” AND “COVID-19” AND “community people” | |
| “mental health” AND “SARS-CoV-2” AND “community people” | |
| Scopus | “mental health” AND “COVID-19” AND “healthcare workers” |
| “mental health” AND “COVID-19” AND “community people” | |
| “mental health” OR “Stress” OR “Depression” AND “COVID-19” | |
| Google Scholar | “mental health” AND “COVID-19” AND “healthcare workers” |
| “mental health” AND “COVID-19” AND “community people” |