U.S. Centers for Disease Control (CDC) updated its brief on the SARS-CoV-2 virus causing COVID-19 transmission on May 7, 2021. This confirms the virus spreads between the mouths and noses of people through the air, up to distance open to debate. Good air circulation can disperse the droplets sooner in indoor and outdoor areas. Today we consider ways of improving indoor ventilation to encourage this.
The Smallest Droplets Remain Suspended Longer
The coronavirus cannot survive a long time outside a human being. But it can travel safely between people in protective droplets of human mucus. These droplets vary in size; however the smallest can remain suspended in the air for minutes, even hours. The best protection is to disperse the clusters in order to diminish their concentration.
The British Medical Journal published a brief on April 14, 2021 discussing ways to achieve this. They believe transmission is more likely between people within close conversation range, and they cite the example of smoking where the odor is more oppressive close up. They also make the point much of the risk can be managed by wearing adequate face masks correctly.
Improving Indoor Ventilation to Complement Masking
We have to accept that the masks we purchase in stores are not 100% effective, the scientists say. And moreover, not everybody wears them correctly, if at all, which increases the risk for everybody. If we accept someone in an indoor environment can inhale sufficient virus to become infected beyond the six-foot distance, then that’s another reason to cleanse the air.
The British Medical Journal wraps up their brief by discussing ways of improving indoor ventilation. Remember, the goal is to break up concentrations of air borne virus, so it becomes less dangerous. And this can be equally important at home too.
They suggest opening windows – or installing / upgrading heating, ventilation, and air conditioning systems if this is not possible. This will also bring additional benefits for employers such as less sick leave, and fewer allergies. And it will help all of us stay safe now and into the future, they say.
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Preview Image: Coronavirus Spreads Like Smoke
