Enlace original:
https://covid19-evidence.paho.org/handle/20.500.12663/384
Offeddu, Vittoria
,
Chee Fu, Yung
,
Low, Mabel Sheau Fong
,
Tam, Clarence C.
,
[Effectiveness of Masks and Respirators Against Respiratory Infections in Healthcare Workers: A Systematic Review and Meta-Analysis]
