Influenza B is a virus that is part of the family of orthomyxoviruses and is responsible for causing a respiratory illness in humans. It is similar to Influenza A, however, Influenza B is not as contagious and typically only affects humans.
The virus is transmitted through contact with an infected person or from airborne particles such as sneezing and coughing. When someone is infected, their body produces antibodies to fight the virus and as a result, they can become sick. Symptoms typically include fever, chills, muscle aches, sore throat, headache, and coughing.
The cause of influenza B is not fully understood, however, it is believed to be caused by various factors. One of the main causes is a weakened immune system. When people are immunocompromised, they are more susceptible to contracting the virus. Another contributing factor is contact with an infected person. People who are in close contact with someone who has the virus can be exposed to the virus and become infected.
In addition, other factors can increase the risk of contracting influenza B such as living in crowded areas, having poor hygiene, and contact with animals. People who are in close contact with animals are more likely to contract the virus since animals can carry the virus and transmit it to humans.
Finally, environmental factors such as cold weather and low humidity can increase the risk of becoming infected with influenza B. When the environment is cold and dry, the virus can more easily spread from person to person.
Overall, Influenza B is caused by a combination of different factors such as a weakened immune system, contact with an infected person, living in crowded areas, poor hygiene, contact with animals, and environmental factors. It is important to take precautions to reduce the risk of becoming infected with influenza B, such as washing your hands regularly, avoiding contact with people who are sick, and getting vaccinated.