The Centers for Disease Control and Prevention (CDC) warns people to take recommended precautions when interacting with pigs and avoiding in contact with them that appear ill.
There are 3 types (A, B and C) of the influenza virus that can cause flu. Each has subtypical strain. H1N1 is a strain of the type A virus. H1N1 is what epidemiologists call a “triple reassortment” virus because it combines genes from different flu viruses, viral strains that normally affect pigs (swine flu), along with birds (avian flu) and human flu strains.
According to the Ambulatory Syllabus of Columbia University Medical Residency Program, the contagious nature of upper respiratory tract infections is the main reason why it is the common acute illness in the US and the world, and the reason for incurring absences from school or from work.
Viruses, not bacteria are the cause of common cold, influenza and most coughs. Antibiotics are only effective against bacterial illnesses and in some cases when used against cold or flu they can do more harm than good, the expert warned.