1. WHO Coronavirus Disease (COVID-19) Dashboard,2020
2. National Public Health Organization. Coronavirus Disease (COVID-19).Retrieved (September, 2020a) fromhttps://eody.gov.gr/wp-content/uploads/2020/03/covid-gr-daily-report-20200320.pdf
3. National Public Health Organization. Coronavirus Disease (COVID-19).Retrieved (September, 2020b) fromhttps://eody.gov.gr/covid-19-odigies-gia-ti-chrisi-maskas-apo-to-koino/
4. United Nations Regional Information Center Brussels. Covid-19 response -transparent masks aid communication for hard of hearing. Retrieved (October, 2020) fromhttps://www.un.org/en/coronavirus/transparent-masks-aid-communication-hard-hearing
5. How do medical masks degrade speech perception?;Goldin;Hear Rev,2020