Vaccinate people at risk and healthcare workers against flu, says European public health office.
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D005060:Europe; D006282:Health Personnel; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D012307:Risk Factors; D014611:Vaccination
D007252:Influenza Vaccines