This all depends on the particular virus or bacteria in question, some can be airborne meaning they simply float around like air and can be inhaled, some require touch and can live on skin and hair and be transferred this way. Some require fluid transfer between host and infectee, others can require specific condition from variants such as heat or being in a particular medium such as water. Many virus and bacteria also require quite specific host bodies to be able to spread, for example many viruses that effect plants are harmless to animals and humans.
viruses
viruses are non living and bacteria are living organisms
Bacteria are prokaryotes. Viruses are not living organisms, virus is a virus, that is all.
Bacteria are able to reproduce on their own while viruses need a host to.
It certainly sounds risky. Please note that AIDSand other STDs are caused by pathogens (bacteria, viruses, etc.); therefore, they can only be transmitted from an infected person to one that is not infected.
Only Bacteria can reproduce outside of a host.. Bacteria are made of cells
Bateria are made of cells APEX~:)
A lack of sanitation is a breeding ground for bacteria and viruses to grow. These bacteria and viruses then affect the individuals visiting/living in these environments, and as a result, they are infected. [diseased]
Yellow Fever and Dengue fever are caused by viruses in the Flavivirus family. They are related but they are very different. Dengue viruses are transmitted by mosquitoes from infected people to healthy people. Yellow fever virus is also transmitted by mosquitoes from sick people to healthy people but may also be transmitted from infected monkeys to healthy monkeys or people.
Viruses
Micro-organisms
Bacteria, viruses, fungus