%0 Journal Article %T Serum 25-Hydroxyvitamin D and the Incidence of Acute Viral Respiratory Tract Infections in Healthy Adults %A James R. Sabetta %A Paolo DePetrillo %A Ralph J. Cipriani %A Joanne Smardin %A Lillian A. Burns %A Marie L. Landry %J PLOS ONE %D 2012 %I Public Library of Science (PLoS) %R 10.1371/journal.pone.0011088 %X Declining serum concentrations of 25-hydroxyvitamin D seen in the fall and winter as distance increases from the equator may be a factor in the seasonal increased prevalence of influenza and other viral infections. This study was done to determine if serum 25-hydroxyvitamin D concentrations correlated with the incidence of acute viral respiratory tract infections. %U http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0011088