1. https://tdtmvjournal.biomedcentral.com/articles/10.1186/s40794-020-00129-9.
2. https://www.worldometers.info/coronavirus/.
3. https://covid19.who.int/region/emro/country/pk.
4. https://www.bbc.com/news/health-52111606.
5. https://covid.gov.pk/vaccine-details.