Final answer:
Influenza is primarily transmitted through airborne droplets and direct contact with infected individuals or surfaces, not through fecal-oral or vector-borne routes.
Step-by-step explanation:
Influenza, also known as the flu, is primarily transmitted through airborne droplets. When someone infected with the flu coughs, sneezes, or talks, they release tiny droplets laden with the virus into the air.
These droplets can then be inhaled by others, leading to new infections. Additionally, the virus can be passed through direct contact with individuals or contaminated surfaces. Influenza A viruses can also be transmitted from animal reservoirs to humans.
It is important to note that while other diseases might be spread through fecal-oral route or by vector-borne mechanisms, such as by mosquitoes or ticks, these are not the routes by which influenza is transmitted.