@WADOHIssues @DocJeffD It's exposure reduction (esp w/good ventilation), not protection. Surgical mask filtration media is effective for small particles but fit is often poor.
@WADOHIssues @DocJeffD 这是减少暴露（尤其是通风良好），而不是保护。外科口罩过滤介质对小颗粒有效，但贴合性通常较差。
@WADOHIssues @DocJeffD It's exposure reduction (esp w/good ventilation), not protection. Surgical mask filtration media is effective for small particles but fit is often poor.
@WADOHIssues @DocJeffD 这是减少暴露（尤其是通风良好），而不是保护。外科口罩过滤介质对小颗粒有效，但贴合性通常较差。