[BostonCard]

Addendum: from a news report yesterday, from South Korea:

Do masks really work? Ask the dozens of Starbucks customers who tested positive for COVID-19 in Seoul this month after a woman with coronavirus sat under one of the cafe’s air-conditioners.

According to a local news report, at least 56 coronavirus cases have been linked to that one customer. The kicker: The four masked workers avoided infection.

The Starbucks SBUX, -0.83% patrons, according to officials, weren’t consistently wearing masks because, of course, it’s hard to enjoy a latte when you can’t access your mouth.

“This speaks volumes about the role masks can play,” Ma Sang Hyuk, a pediatric infectious diseases physician in South Korea, explained to Bloomberg News. “Masks may not provide 100% protection, but there’s nothing out there that’s as effective.”

Local authorities made it mandatory this week for everybody to wear masks both indoors and outdoors, as the greater Seoul area has seen a surge in coronavirus cases.

Another example.  Remember the two hairstylists in Missouri who tested positive for COVID?  They didn't pass it on to any of their 100+ customers.  While causality is hard to determine with certainty, there's a good chance that the fact that they were masked was a contributing factor.

BC

[BostonCard]

Addendum: from a news report yesterday, from South Korea:

Do masks really work? Ask the dozens of Starbucks customers who tested positive for COVID-19 in Seoul this month after a woman with coronavirus sat under one of the cafe’s air-conditioners.

According to a local news report, at least 56 coronavirus cases have been linked to that one customer. The kicker: The four masked workers avoided infection.

The Starbucks SBUX, -0.83% patrons, according to officials, weren’t consistently wearing masks because, of course, it’s hard to enjoy a latte when you can’t access your mouth.

“This speaks volumes about the role masks can play,” Ma Sang Hyuk, a pediatric infectious diseases physician in South Korea, explained to Bloomberg News. “Masks may not provide 100% protection, but there’s nothing out there that’s as effective.”

Local authorities made it mandatory this week for everybody to wear masks both indoors and outdoors, as the greater Seoul area has seen a surge in coronavirus cases.

Another example.  Remember the two hairstylists in Missouri who tested positive for COVID?  They didn't pass it on to any of their 100+ customers.  While causality is hard to determine with certainty, there's a good chance that the fact that they were masked was a contributing factor.

BC