Influenza B is a virus that is spread through contact with respiratory secretions, such as saliva, mucus, or nasal secretions. The virus is usually spread through coughing and sneezing, but can also be spread through contact with contaminated surfaces or objects, such as door handles, telephones, and computer keyboards.
When an infected person coughs, sneezes, or talks, they release virus-laden droplets into the air. These droplets can be inhaled by other people, or they can land on surfaces and objects where they can remain infectious for several hours. If someone touches a contaminated surface or object, and then touches their nose, eyes, or mouth, they can become infected.
In addition, influenza B can be spread through direct contact with an infected person. If an infected person coughs or sneezes on someone, or if someone touches the saliva of an infected person, they can become infected.
The best way to prevent the spread of influenza B is to practice good hygiene. Wash your hands regularly with soap and water, and avoid touching your face. Cover your mouth and nose with a tissue when coughing or sneezing, and dispose of the tissue promptly. If you are sick, stay home and avoid contact with others, and practice good respiratory hygiene by coughing and sneezing into your elbow.