Influenza vaccination of cancer patients during PD-1 blockade induces serological protection but may raise the risk for immune-related adverse events ===================================================================================================================================================== * Heinz Läubli * Catharina Balmelli * Lukas Kaufmann * Michal Stanczak * Mohammedyaseen Syedbasha * Dominik Vogt * Astrid Hertig * Beat Müller * Oliver Gautschi * Frank Stenner * Alfred Zippelius * Adrian Egli * Sacha I. Rothschild