The Office of the Principal Scientific Advisor to the Government of India has issued a detailed manual on homemade masks : “Masks for Curbing the Spread of SARS-CoV-2 Coronavirus”. Quoting the World Health Organization , the manual states that “Masks are effective only when used in combination with frequent hand-cleaning with alcohol-based hand rub or soap and water. If you wear a mask, then you must know how to use it and dispose of it properly.”
Analyses show that if 50% of the population were to wear masks, only 50% of the population would be infected by the virus. Once 80% of the population wears a mask, the outbreak can be stopped immediately.
On Why Wear a Mask?, it says that “COVID-19 virus spreads easily from person to person contact. Virus carrying droplets dry fast enough to form droplet nuclei and remain airborne eventually landing on different surfaces. SARS-CoV-2, the virus that causes COVID-19, has been detected in aerosols for up to three hours and on plastic and stainless steel surfaces for up to three days. (N.Engl J.Med. 2020)”.
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