title: [Every year a different strain of flu?].
mesh_terms: D014644:Genetic Variation; D006801:Humans; D007251:Influenza, Human / Q000382:microbiology* / Q000517:prevention & control; D009975:Orthomyxoviridae / Q000302:isolation & purification*; D014611:Vaccination
vernacular_title: Elk jaar een andere griep?