डब्ल्यूएचओ आमतौर पर स्वस्थ लोगों के लिए फेस मास्क की सिफारिश नहीं करता है। हालाँकि, सीडीसी ने अब नई गाइडलाइन रखी है और कहा है कि "लोगों को बाहर जाने पर कपड़े का मास्क पहनना चाहिए"। नए सबूत बताते हैं कि सर्जिकल फेस मास्क के उपयोग से मानव कोरोनावायरस और इन्फ्लूएंजा वायरस को रोगसूचक व्यक्तियों से फैलने से रोका जा सकता है।
COVID -19 वाइरस संक्रमित व्यक्तियों की साँस और खाँसी में मौजूद होता है और खांसने और छींकने वाले लोगों से हवाई बूंदों से फैलता है।
की प्रभावकारिता के बारे में बहस हुई है चेहरे का मास्क in reducing spread of the वाइरस. The international body WHO doesn’t recommend them generally to the healthy people. However, CDC has now laid down new guideline and say ”people should wear cloth masks when they go outside”.
In the brief communication published in Nature Medicine on 03 April 2020, the researchers found that the usage of surgical face masks could prevent spread of human coronaviruses and influenza वायरस from symptomatic individuals.
श्वसन वाइरस infections spread between human beings through contact, respiratory droplets and fine-particle aerosols. However, there are uncertainties around modes of transmission of COVID-19.
In this study, the researchers quantified the amount of वाइरस in exhaled breath of participants and determined the potential efficacy of surgical face masks in preventing the transmission. Of 3,363 screened individuals, 246 individuals provided exhaled breath samples The 50% participants were randomized to ‘not wearing a face mask’ during the exhaled breath collection and the rest were randomized to ‘wearing a face mask’. They tested viral shedding in nasal swabs, throat swabs, respiratory droplet samples and aerosol samples and compared the latter two between samples collected with or without a face mask.
They found viral shedding to be higher in nasal swabs than in throat swabs. Further, they detected कोरोना in 30-40% samples collected from participants without face masks but no वाइरस was detected in droplets and aerosols collected from patients wearing face masks.
This study demonstrated the efficacy of surgical masks in reducing coronavirus detection and viral copies in respiratory droplets and in aerosols suggesting that the surgical face masks could be used by ill people to reduce onward transmission of the वाइरस.
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संदर्भ:
Leung, N.H.L., Chu, D.K.W., Shiu, E.Y.C. et al. Respiratory वाइरस shedding in exhaled breath and efficacy of face masks. Published on 03 April 2020. Nature Medicine (2020). DOI: https://doi.org/10.1038/s41591-020-0843-2
