Postal surveillance of acute respiratory virus infections in general practice.
D000328:Adult; D002648:Child; D002675:Child, Preschool; D005194:Family Practice; D006801:Humans; D007223:Infant; D009975:Orthomyxoviridae / Q000302:isolation & purification; D011159:Population Surveillance; D011177:Postal Service; D012141:Respiratory Tract Infections / Q000382:microbiology*; D018108:Respirovirus / Q000302:isolation & purification; D014777:Virus Diseases / Q000382:microbiology*