APPLIED BIOLOGICAL SCIENCES Correction for “Nanoparticles reveal that human cervicovaginal mucus is riddled with pores larger than viruses,” by Samuel K. Lai, Ying-Ying Wang, Kaoru Hida, Richard Cone, and Justin Hanes, which appeared in issue 2, January 12, 2010, of Proc Natl Acad Sci USA (107:598–603; first published December 16, 2009; 10.1073/pnas.0911748107).
The authors note that, due to a printer's error, on page 598, right column, first full paragraph, lines 7–10 “This approach requires, however, that nanoprobes be engineered to avoid adhesive interactions with mucus (1, 8, 15, 16), making them unsuitable as probes of mucus microstructure” should have appeared as “This approach requires, however, that nanoprobes be engineered to avoid adhesive interactions with mucus. Nearly all synthetic nanoparticles strongly adhere to mucus (1, 8, 15, 16), making them unsuitable as probes of mucus microstructure.”
Additionally, on page 601, left column, first full paragraph, line 13 “(liquid Freon at 170 °C)” should have appeared as “(liquid Freon at −170 °C).”
Lastly, on page 602, right column, first full paragraph, lines 10–11 “(approximately 108–109∇ viral particles/mL)” should have appeared as “(approximately 108–109 viral particles/mL).” These errors do not affect the conclusions of the article.