1/ SARS-CoV-2 travels in aerosol particles emitted from an infected individual. You want to reduce the amount of these particles you breathe (lower inhalation dose is important). We know from decades of research that the following lower your inhalation dose of aerosol particles.
2/ Masks: The higher the quality and better the fit the less aerosol particles you inhale that came out of the respiratory system of an infected person. No rocket science here.
3/ Ventilation: The greater the amount of ventilation the lower the aerosol particle concentration that originated from an infected individual(s) in the air of indoor spaces. That means you will inhale less. No rocket science here.
4/ Improved filtration in HVAC system: Higher MERV-rated filters (if properly seated and maintained), e.g., MERV 13 over MERV 8, means greater efficiency at capturing aerosol particles emitted from an infected individual. That means you will inhale less. No rocket science here.
5/ Portable HEPA filters, properly-sized for the indoor space, reduce the amount of aerosol particles in indoor air that came out of an infector's respiratory system. This lowers how much you breathe. No rocket science here.
6/ If you get fully vaccinated (a gift to humankind) and follow these simple methods (known for decades to over a century in the case of masks) for reducing inhalation dose of aerosol particles you will take a GIANT leap toward protecting yourself and those around you.
7/ And, of course, avoid non-essential, and especially crowded, indoor environments, wask hands, get tested if you have any concern about being exposed, and quarantine if exposed or feeling symptoms.
8/ No rocket science to any of this. No need to wait for RCTs. Reducing inhalation dose is critical and has been from day 1. We know how to do this. Just do it!
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