Types of flu
influenza a is the most common form of flu and it is the root cause behind the serious epidemics. Influenza a virus has recently shifted into mammals. Birds have the greatest number and range of influenza strains. Apart from birds, it sometimes appears in pig, human and horse influenza strains as well.
influenza b is restricted to humans only and it changes less often as compared to influenza a viruses. Occurrence of influenza b is unpredictable but there's a possible chances of its occurring at the same time as influenza a does. An influenza b virus is always included in the annual vaccine, so anyone who receives a flu shot during a particular will stay away from this virus.
Influenza c it's normally transmitted from person to person via contagious droplets that are spread when an infected person sneezes or coughs. It's very common but rarely causes disease symptoms. The common indication of this flu is high temperature, flushed face, body aches, and lack of energy.