CRP and Recurrent lower respiratory tract infections: Few patients fulfilled less than two diagnostic criteria (symptoms of lower respiratory tract infection (cough +/- expectoration), emerging findings on examination of the chest (tachypnea, damping and/or auscultation of murmurs), signs of systemic disease (systemically unwell and/or temperature >38° C)) and had a CRP test <20 mg/l (Table 1).