In 2018, a veterinarian became sick shortly after swabbing sows exhibiting respiratory syndrome on a farm in France. Epidemiologic data and genetic analyses revealed consecutive human-to-swine and swine-to-human influenza A(H1N1)pdm09 virus transmission, which occurred despite some biosecurity measures. Providing pig industry workers the annual influenza vaccine might reduce transmission risk.
Keywords: France; H1N1; H1N1pdm09; biosecurity; case report; farms; human; human–swine transmission; influenza; influenza A(H1N1)pdm09; interspecies transmission; pandemic; respiratory infections; reverse zoonosis; swine; swine–human transmission; transmission; viruses; zoonoses; zoonotic disease.