CDC used to tell us to NOT wear masks. They made a 180 degree turn and now they are recommending “cloth face covers“. They attribute this to “recent studies” and “new evidence”:
“We now know from recent studies that a significant portion of individuals with coronavirus lack symptoms (“asymptomatic”) and that even those who eventually develop symptoms (“pre-symptomatic”) can transmit the virus to others before showing symptoms. This means that the virus can spread between people interacting in close proximity—for example, speaking, coughing, or sneezing—even if those people are not exhibiting symptoms. In light of this new evidence, CDC recommends wearing cloth face coverings”
But, there was evidence since January 30th:
Transmission of 2019-nCoV Infection from an Asymptomatic Contact in Germany (January 30 date is at bottom. This copy verifies this.)
As shown in my previous post (DO NOT LISTEN TO WHO OR GOVERNMENTS ABOUT MASKS), there have been numerous cases and studies of asymptomatic transmission since then.
Here is another:
Here is one worth repeating. Asymptomatic transmission can be the source of 79% of infections.
Most of our cases are likely infected by people who thought they were healthy. If you want to avoid getting infected, you need to assume that anyone can be infected and contagious. If you want avoid infecting others, you need to wear a mask and keep your distance, even if you think you are healthy.
There is evidence that the virus is aerosol. Even CDC is concurring by stating that “speaking” can spread it. How far can your breath go? If people are breathing outside in the cold air, the warm breath probably stays in the air much longer than most think and get blown many meters away by the wind. Pedestrians and joggers are still on the streets and sidewalks. They are likely still infecting and getting infected. The young joggers may never get symptoms. But they might infect their parents or a nursing home worker.
But you cannot blame them because the government is not warning them. The Canadian government still thinks that only people with symptoms can spread the virus, by telling you that you do not need to wear a mask if you think you are healthy.
The authorities still give illogical reasons, such as: you may not know how to wear a mask, or you might have a false sense of security.
It is easier to wear the mask than to tie your shoes. Even if the mask provides less than 100% security, 50% is better than 0%, which is what you would have with no mask.
The virus enters you through the mouth, nose and sometimes through the eyes. The mask stops you from touching your mouth and nose. The virus comes out of your mouth and nose. The mask stops most of this.
The most important reason to wear a mask is to stop asymptomatic transmission. The main reason the surgeon wears a mask is NOT to protect himself/herself from the patient, but to protect the patient from the surgeon, so that the surgeon is not breathing germs into the patient. If nursing/retirement home workers were told to wear masks, even if they think they are healthy, there would be fewer deaths today.