Respiration consists of two acts: first inspiration, then expect(or)ation...
Jones
Taff
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D000368:Aged; D000375:Aging / Q000276:immunology; D006801:Humans; D008017:Life Expectancy; D008019:Life Style; D012141:Respiratory Tract Infections / Q000382:microbiology / Q000517:prevention & control*; D014612:Vaccines / Q000276:immunology / Q000627:therapeutic use*
D014612:Vaccines