New influenza A(H1N1) virus infections in Spain, April-May 2009.
An outbreak of infections with a new influenza A(H1N1) virus that was first detected in the United States and Mexico is currently ongoing worldwide. This report describes the initial epidemiological actions and outbreak investigation of the first 98 laboratory confirmed cases of infection with this new virus in Spain.
D000293:Adolescent; D000328:Adult; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000302:isolation & purification*; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics; D011159:Population Surveillance; D013030:Spain / Q000453:epidemiology; D055815:Young Adult