Barbas y cubrebocas
Referencias: Prince, S. E., Chen, H., Tong, H., Berntsen, J., Masood, S., Zeman, K. L., . . . Samet, J. M. (2021). Assessing the effect of beard hair lengths on face masks used as personal protective equipment during the COVID-19 pandemic. Journal of Exposure Science & Environmental Epidemiology, 31(6), 953-960. doi:10.1038/s41370-021-00337-1 Singh, R., Safri, H.,…