((ti:("febre amarela" OR "yellow fever" OR "fiebre amarilla" OR "fievre jaune" OR YFV OR ((yellow AND fever*) AND "yellow fever")) OR mh:"Febre amarela" OR mh:"Virus da Febre Amarela") OR (ti:(virus or flavivirus* OR vetor OR aedes OR strain OR cepa OR mosquit* OR urban*) AND ("febre amarela" OR "yellow fever" OR "fiebre amarilla" OR "fievre jaune" OR YFV))) AND (da:20*)
