Usually, Neutrophils make up less than 3% of all cells found in the broncho-alveloar lavage fluid. In children, standard value of neutrophils is higher depending on their age (children under the age of 5 show a maximum value of 10%). This elevated cell proportion is a sign for acute and chronic infections (HP:0012387, HP:0006538) and can be associated to specific diseases. [https://orcid.org/0000-0002-0104-692X, ISBN:0412792702, PMID:10678650, PMID:3396403]
