A type of respiratory tract infection caused by an influenza strain that started in pigs. H1N1 flu is also known as swine flu. It's called swine flu because in the past, the people who caught it had direct contact with pigs.
When AGNI get vitiated by DOSHAS like vata,pitta and kapha and due to that the function of AGNI get reduced and it cannot digest food properly. This undigested, unmetabolized food is called as ‘’AMA’’ or ‘’AMAVISHA’’ ( due to fermantation and putrefaction of this undigested food material its also called as toxins) which cannot be utilized by body.
AGNI means FIRE which derives all digestive , metabolic processes in human body. when we eat something, by chewing the food saliva starts the digestive function at initial phase,then swalloed food reaches to stomach,where pachakagni (digestive fire ) with pachak pitta (digestive enzymes ) starts the actual process of digestion.