MEDICAL SCIENCES. For the article “Cloning of a human parvovirus by molecular screening of respiratory tract samples,” by Tobias Allander, Martti T. Tammi, Margareta Eriksson, Annelie Bjerkner, Annika Tiveljung-Lindell, and Björn Andersson, which appeared in issue 36, September 6, 2005, of Proc. Natl. Acad. Sci. USA (102, 12891–12896; first published August 23, 2005; 10.1073/pnas.0504666102), on page 12892, right column, line 20, the authors note an error in the primer sequence. Sequence 188F should read: GAGCTCTGTAAGTACTATTAC. This error does not affect the conclusions of the article.