As observed in other studies, we found that stainless steel supported the viability of influenza viruses longer than other tested metals. Metals have been demonstrated to have low levels of anti viral activity [25] [26] [27] ; and stainless steel has previously been demonstrated to support influenza virus viability for longer than that of copper [28] . Confirmation of these results raises questions about the use of stainless steel in healthcare and daycare settings in particular.