The PEC treatment in the presence of 1 . 0 mM Br ( PEC - Br ) shows the highest virucidal efficiency , enabling complete inactivation of a $ 1000 TCID50 replication - deficient recombinant adenovirus ( RDRADS ) population within 31 . 7 s . The superior virucidal performances of PEC - X treatments can be attributed to the increased production of active oxygen species and