The evidence.
The issue of nailbrushes seems to be unidentified by infection control literature, including the Infection Control Nurses' Association hand hygiene guidelines. The infection risk is, however, that they will be used as communal items, like a bar of soap, so may transmit micro-organisms. Therefore, in acute care their use should be discouraged. If used, they should be single use, and then disposed of.
Philip
P
Woodrow
Debbie
D
Weston