In a book titled: The Body; a guide for occupants" by Bill Bryson
On page 48 he writes about viruses:
Viruses are terribly small-much smaller than bacteria and too small to be seen under conventional microscopes. If you blew one up to the size of a tennis ball, a human would be 500 miles tall. A bacteria on the same scale would be the size of a beach ball. Blockquote
Of the hundreds of thousands of viruses supposed to exist, just 586 species are known to infect mammals and of these only 263 affect humans. Blockquote
The average person has 174 species of viruses in their lungs, 90% which had never been seen before Blockquote
So thenâŚhow large would the holes in a N-95 mask be when expanded to the tennis ball
500 mile tall man be in the same ratio ? Would those holes be 50 miles wideâŚtrying to screen out tennis ball sized viruses ? At what point are we just kidding ourselves about these mask ?
Now all of this is about air born viruses. What about sea water born viruses ?
The average quart of sea water contains 100 billion viruses. From a study done at
State University at Stonybrook NY. in 1986 Blockquote
Ocean viruses if laid end to end would stretch for 10,000,000 light yearsâŚa distance beyond imagination. Blockquote
This would be 1/10 the distance across the Milky Way Galaxy.
Viruses can lay in wait until the circumstances are right. One team of French researchers in 2014 found a âpithovirusâ in Siberia that had been trapped in permafrost
for 30,000 years. When it was injected into an âamebaâ (a single cell animal) it immediately became active. By themselves viruses are inert and not alive.
One UK study suggest people touch their faces about 16 times an hour.
In the end âmucusâ (human fluid) is the vehicle viruses tend to transmit thru. This makes
nasal mucus and paper money the most common carriers and then door knobs, and other surfaces including shaking handsâŚ
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