Facing today's issues.
D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000517:prevention & control / Q000635:transmission; D009784:Occupational Diseases / Q000453:epidemiology; D009787:Occupational Medicine; D011159:Population Surveillance; D011315:Preventive Medicine; D011634:Public Health; D014481:United States; D014611:Vaccination