Health surveillance of alive wild harbor seals (Phoca vitulina) and grey seals (Halichoerus grypus) in the German Wadden Sea and North Sea: virological and microbiological screening - Gross, Stephanie; Postel, Alexander; Prenger-Berninghoff, Ellen; Becher, Paul; Ewers, Christa; Siebert, Ursula (2024)