![Reproduction ratio in epidemic or endemic context](https://www.pig333.com/3tres3_common/art/pig333/10835/reproduction-ratio-in-epidemic-or-endemic-context_97351.jpg?w=650&h=366&ho=1&ts=1653979446)
Swine Influenza can persist endemically in Farrow-to-Finish farms
Infectious outbreaks can last for more than a month at a population level, which explain that a new batch including mainly susceptible piglets can get infected if the animals are housed in a separate room but in the same compartment (airborne transmission).