Saying that less than 10 percent of Covid transmission occurs outdoors is akin to saying that sharks attack fewer than 20,000 swimmers a year. (The actual worldwide number is around 150.) ...

But there are tens of millions of other entities that are also counted as a business. This week's Data Drop number: The percentage of the more than 32.5 million U.S. businesses that have zero ...

“We really don’t know what the real number is. I think the real range is somewhere between 70 to 90 percent ... through vents to infect people in other rooms. In some studies of outbreaks ...