Influenza c is rarely included in vaccine for prevention because there is no ability to form antibodies the symptoms are the same as the common cold it is not spread the same as a or b it only affects persons who are immunocompromised

When we say influenza, this is actually a known respiratory viral infection, and therefore, it is highly contagious or can be easily spread from one person to another. Common symptoms of this disease include fever, headache, and fatigue. The reason why this is not commonly included in vaccine for prevention because it only affects those who are immunocompromised. Hope this helps.