4.4.2.4 When tested in accordance with 6.12.2 and 6.12.6 for the minimum exposure time at the minimum concentration and the minimum temperature to be used in the WD the disinfectant shall demonstrate:
a) at least a log106 inactivation of vegetative bacteria including, yeasts and yeast-like fungi;
b) at least a log105 inactivation of mycobacteria;
c) at least a log104 inactivation of fungal spores and viruses.
NOTE The reduced requirement in respect of fungal spores and viruses is based on recognition of the practical difficulty of working with high titres of these organisms to reliably demonstrate higher levels of inactivation.