“An important message for veterinarians and farmers is that the spread of ASF from farm to farm is possible with a very small dose of the virus” Professor Grzegorz Wozniakowski is Head of the Department of Swine Diseases at the National Veterinary Research Institute in Puławy, Poland, and also Director of Poland’s National Reference Laboratory on African swine fever. In addition to sharing his expertise on the diagnostic methods available for ASF, he describes a Polish study published in 2020 which demonstrated a delay of up to five days after infection before the appearance of clinical signs and found that even an extremely low titre of the viral strain tested was enough to infect pigs. Running time: 34 minutes