Viruses are biological entities that can only thrive and multiply in a host, which is a living organism such as a human, an animal, or a plant. Some viruses cause disease. For example, severe acute respiratory syndrome coronavirus 2, or SARS-CoV-2, causes the disease COVID-19.
One of the best things you can do to protect yourself during cold and flu season (and really anytime of the year) is to break the transmission cycle by routinely washing your hands.
But also learn other ways to protect yourself
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. But Is that all there is ????
Teeth consist mostly of hard, inorganic minerals like calcium. They also contain nerves, blood vessels and specialized cells. But they are not bones. Teeth don't have the regenerative powers that bones do and can't grow back together if broken