Millennium bug.
Lipley
N
N
D004196:Disease Outbreaks; D005060:Europe / Q000453:epidemiology; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000451:nursing*; D009656:North America / Q000453:epidemiology; D009740:Nursing Staff / Q000600:supply & distribution*