The evolution of influenza can happen in a pig which is suitable for a virus to evolve. Within the pig’s stomach, the virus can run into another form of influenza and create a new and maybe a better version of influenza that is deadlier. That means that this version could be immune to certain medicine. The battle within the human or animal body is an ever-recurring fight and not succumbing to influenza. The fight for survival is constant from lack of resources to sickness and disease. When two influenza viruses come in contact with one another the try to overpower the other one to get to the genes. The successful one then gets genes from the weaker one and creates a copy of itself and the one that overpowered the other will input its genes
