Do masks still protect us? The hot-button issue has once again surfaced in Hong Kong after three people passing through a railway station nine seconds apart led to the transmission of the Omicron variant to a kindergarten teacher.Two infectious diseases experts the Post spoke to said they believed masks still did, but two – one surgical and one cloth mask on top of it – offered better protection against the highly contagious Covid-19 variant.The debate around masks came as Hong Kong battled…
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