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Are two free N95 masks enough? What to know about wearing and reusing them amid the haze

Are two free N95 masks enough? What to know about wearing and reusing them amid the haze
Photo: CNA — Singapore · view original

Two N95 masks may be enough for a week for someone who wears them only for short commutes, but those who spend several hours outdoors may need to replace them more often, says an NUS public health expert.

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