Viruses differ greatly in size, the smallest being about 20 nanometers in diameter to the largest measuring some 400 nanometers across. For reference, a human hair is about 60,000 nanometers in ...
You don't have eyes in the back of your head. It is impossible to keep watch over every private door in a public-facing space: the storeroom in a shop or pharmacy, or the toilet for staff use only.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback