India, Aug. 21 -- H1N1 influenza is a contagious respiratory infection that can spread from person to person, mainly through respiratory particles released when an infected person coughs, sneezes, talks, or breathes. Influenza can range from mild illness to severe complications, particularly among people at higher risk.

As concerns over flu infections grow, knowing the common H1N1 symptoms, warning signs, prevention measures, and treatment options can help people respond promptly.

What is H1N1 Swine Flu?

H1N1 is a subtype of influenza A virus. The term "swine flu" became widely known after the 2009 H1N1 pandemic, and the virus subsequently became part of the viruses that circulate as seasonal influenza.

Influenza primarily affects the...