Swine flu

Swine flu (swine influenza) is a respiratory disease caused by viruses (influenza viruses) that infect the respiratory tract of pigs and result in nasal secretions, cough, decreased appetite, and restless behavior.

Swine flu is an infection caused by a virus. Swine flu is a relatively new strain of influenza (flu) that was responsible for a flu pandemic during 2009-2010. It is sometimes also known as H1N1 influenza because it is the H1N1 strain of virus.
Swine flu viruses may mutate (change) so that they are easily transmissible among humans.

On 10 August 2010, the World Health Organization (WHO) declared that the swine flu pandemic was officially over. However, this does not mean that swine flu has been completely eliminated.
The swine flu virus is generally seen during the winter. It has therefore been included in the 2012-13 seasonal flu vaccine.

https://www.medylife.com/blog/health/swine-flu-symptomsdiagnosis-cure/