@LearnAerosols @drkristenkc @Don_Milton Inhale prior to removing mask. Hold breath. Exhale while putting mask back on.
@LearnAerosols @drkristenkc @Don_Milton 在取下面罩之前吸气。屏住呼吸。重新戴上面具时呼气。
@LearnAerosols @drkristenkc @Don_Milton Inhale prior to removing mask. Hold breath. Exhale while putting mask back on.
@LearnAerosols @drkristenkc @Don_Milton 在取下面罩之前吸气。屏住呼吸。重新戴上面具时呼气。