They wondered why. Here is the reason.
They wondered why they or their loved ones were found by the Coronavirus. They did take precautions.
"Coronavirus might spread much farther than 6 feet in the air. CDC says wear a mask in public.
Air contaminated with the COVID-19 virus might travel four times farther than the 6 feet the CDC asks we distance ourselves, according to a recent study.
The study published in the Journal of the American Medical Association found that under the right conditions, liquid droplets from sneezes, coughs and just exhaling can travel more than 26 feet and linger in the air for minutes.
Findings such as these may have some bearing on the CDC's recommendation on Friday that Americans wear non-surgical face masks in public — especially in places "where other social distancing measures are difficult to maintain."
“There is no virtual wall at this 3- to 6-feet distance” says Lydia Bourouiba, the study's author, who specializes in fluid dynamics and is an associate professor at the Massachusetts Institute of Technology. These findings suggest the greatest risk is for health care workers working with infected patients, she says.
As seen in this video, shot from different views and posted with Bourouiba's report, the invisible cloud can travel up to 26 feet:
The study focuses on a turbulent gas, the cloud emitted when someone coughs, sneezes or exhales. Liquid droplets of various sizes drop onto surfaces, while others can be trapped in a cloud that can swirl around a room with a payload, in theory, of pathogen-bearing droplets.
How cough and sneeze droplets travel
A lot goes into how far the cloud and its droplets travel: a person's physiology, the environment, humidity and temperature. “The cloud can reach up to 26 feet for sneezes and less than that for coughs — about 16 to 19 feet,” Bourouiba says.
According to a 2009 World Health Organization report, when someone coughs, they can spray up to 3,000 droplets. A sneeze could yield 40,000."
from USA Today, 4 3 2020