What is the causative organism of seasonal influenza?

Answer 1

The common cold is an upper respiratory tract infection of viral origin, usually caused by a rhinovirus (up to 40% of colds), or by Coronaviruses (about 20%). These are the more common viruses, but there are more than 200 different viruses (some say as many as 700) that can cause the common cold. There are a huge number of different viruses from a number of different viral 'families' that cause cold symptoms.

This is the main reason there is no vaccine for the common cold - there are simply too many different viruses to develop vaccines specific to each virus, and before a vaccine can be developed for a new viral mutation, it can mutate again.

Answer 2

The human seasonal flu, as well as other types of human influenza, are caused by three types of viruses: influenza Types A, B, and C. Swine Flu is caused by an influenza type A influenzavirus, for example. Type A flu viruses have been the causes of all influenza pandemics to date.

Within each type there are mutations and countless numbers of strains and subtypes. The influenza viruses are RNA viruses that come from the family Orthomyxoviridae.

Answer 3

Human influenza causing viruses can belong to any of three major influenza-causing Orthomyxoviruses: Influenza A virus, Influenza B virus and Influenza C virus. Keep in mind that the "flu" is a severe upper respiratory infection and doesn't affect the intestinal tract.

Answer 4

The causative organism of seasonal influenza is the influenza virus, specifically types A and B. These viruses are responsible for causing the flu, a contagious respiratory illness that can lead to symptoms such as fever, cough, sore throat, and body aches.