新型冠狀病毒

Lex - Coronavirus, contagion and concerns

Long queues to buy surgical masks have become a common sight across Asia. Masks do little to prevent the inhalation of airborne coronavirus particles, which are mostly too small to filter out, say experts. That has not stopped the stockpiling.

Fortunately, the new coronavirus outbreak has so far been less deadly than its predecessors. Its fatality rate of around 3 per cent is about a third that of Sars, or severe acute respiratory syndrome, and much lower than the 34 per cent for Middle East respiratory syndrome (Mers). Its  impact on markets  should be that much less systemic.

It may not seem that way. The new coronavirus can be infectious before symptoms start showing, according to studies. This means easier and faster transmission among the unsuspecting. Sars, only contagious after symptoms developed, was easier to screen and avoid.

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