1. Ramkumar, S., “The basics and the alternatives,” Advanced Textiles Source, 25 May 2020. Available [Online] https://advancedtex-tilessource.com/2020/05/25/the-basics-and-the-alternatives/ <4Oct2022>.
2. Ramkumar, S. and, Mirza, K., “Masking strategy to counter infection,” Int. Fiber J., 31 January 2022. Available [Online] https://www.fiberjournal.com/masking-strategy-to-counter- infection/ <4Oct2022>.
3. WHO, “WHO coronavirus (COVID-19) dashboard,” World Health Organization, Geneva. Available [Online] https://covid19.who.int <4Oct2022>.
4. WHO, “Coronavirus disease (COVID-19) pandemic,” World Health Organization, Geneva. Available [Online] https://covid19.who.int/region/searo/country/in <4Oct2022>.
5. Lee, B.U., Int. J. Environ. Res. Public Health 17(19): 6960(2002). https://doi.org/10.3390/ijerph17196960.