TY - JOUR T1 - <em>To the Editors</em> JF - European Respiratory Journal JO - Eur Respir J SP - 1412 LP - 1413 DO - 10.1183/09031936.00098608 VL - 32 IS - 5 AU - W. B. Grant Y1 - 2008/11/01 UR - http://erj.ersjournals.com/content/32/5/1412.abstract N2 - The recent paper by McManus et al. 1 linking high levels of Epstein–Barr virus (EBV) to chronic obstructive pulmonary disease (COPD) is important as it appears to provide additional evidence supporting a connection between low serum 25-hydroxyvitamin D (calcidiol) and risk of COPD, and thus a possible simple way to reduce the risk of COPD. In an observational study, low pulmonary function was found to correlate with low serum calcidiol levels 2. Statistically significant higher values of forced expiratory volume in one second (FEV1) were found in: both sexes; those &gt;60 yrs of age; White and Black subjects; subjects of any smoking status; subjects with … ER -