HONG KONG: Tests on hamsters reveal the widespread use of facemasks reduces transmission of the deadly coronavirus, a team of leading experts in Hong Kong said Sunday.
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Surgical masks were placed between the two cages with air flow travelling from the infected animals to the healthy ones.
The researchers found non-contact transmission of the virus could be reduced by more than 60% when the masks were used. Two thirds of the healthy hamsters were infected within a week if no masks were applied.
The infection rate plunged to just over 15% when surgical masks were put on the cage of the infected animals and by about 35% when placed on the cage with the healthy hamsters. Those that did become infected were also found to have less of the virus within their bodies than those infected without a mask.
"It's very clear that the effect of masking the infected, especially when they are asymptomatic -- or symptomatic -- it's much more important than anything else," Yuen told reporters Sunday. "It also explained why universal masking is important because we now have known that a large number of those infected have no symptom."