There are five/six input-lets (inlets) in a human body:
1. Eyes: we take in light, and we see the outer world.
2. Nose/nostrils: we take in air, and breathe for oxygen.
3. Mouth: we take in food and liquids.
4. Ears: we take in sound waves, and can hear.
5. Skin: we take in oxygen.
6. Some secret parts in a woman: we will not discuss this aspect here.
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Because of the eardrums, tiny things don't enter inside.
If some particles enter eyes, still they don't go inside.
However, both the eyes and ears can get infected and create pain and uneasiness.
So, the main issues are with the two inlets that can be considered as major ones: nostrils, and mouth, and this I am discussing here because of the present CoViD situation.
Air:
If we breath bad polluted air, then it will affect the lungs-sacks, and we might get respiratory problems. Also, viruses can get into the lungs and make us sick, these viruses would choke the respiratory system and we would feel shortage of oxygen, and get into the condition of pneumonia, and deep chest infection, that could be deadly.
So, this necessitates that we always breath pure and, and viruses-disease free air, otherwise our life would be threatened.
Food:
In the similar way, we should eat good, fresh and nutritious foods. Any contamination of the food might create food poisoning and/or nausea-vomiting. Also, too spicy and oily food would create acidity. Some bad food or tough foods would create either indigestion, stomach upsets and/or constipation.
In the present situation of Covid19, we needed to protect these two major inlet channels, and most of us were/are unaware of these simple facts, and many faced severe difficulties, and suffered losses.
Mostly, those who have mainly followed the rule of: mask, sanitization, and distance have been more safe than who have not taken these precautions.
So, simple logic is follow the code: MaSaDi, easy to remember even for children and old, and even the sick persons.
Beyond this there are a few more precautions, but basic is re-suggested, and of course it is very well known, and the needs/reasons have been reiterated here:
Monitor the two major inlets to human body: nose and mouth, the close neighbours!
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