In stark contrast with the run of the mill flu virus, the H1N1 influenza actually exhibits the capacity to infect the cells really deep into the lungs, in which it can then cause the problem of pneumonia and even fatal problems. The seasonal viruses infect just the cells in upper respiratory tract. In order to assess pathogenic nature of H1N1 virus, the researchers infected different sets of ferrets, primates and mice with seasonal flu and pandemic viruses. They then found that H1N1 virus imitates more efficiently in respiratory system than the seasonal flu thereby causing serious lesions in one’s lungs just like those that are caused as a result of virulent pandemic flu types.h1v1_a.

The novel H1N1 virus was basically called as the swine flu due to laboratory testing highlighting many genes in the virus to be similar to the influenza viruses which generally occur in the pigs. However further researches have highlighted that this latest virus is different from the one that is circulated among the pigs of North America. It has the two genes from flu virus that circulate in the pigs of Europe as well as Asia and the human and bird genes. Researchers call this new type of flu virus as the quadruple reassortant virus.

The human infection with latest H1N1 virus is still ongoing in different parts of the world. Most individuals who have suffered some illness with the H1N1 virus have actually recovered without needing any type of medical aid. The spread of this novel H1N1 virus is taken to take place in the similar manner that the seasonal flu spread its trap. The flu virus is mainly spread from one individual to another through sneezing and coughing. Sometimes the individuals can become infected even by touching the surfaces or objects having the flue viruses. Also, illnesses occurring from the H1N1 virus has been ranged from mild to really sever and even fatal.