6 ▁hours ▁total ▁C . ▁diff icile ▁increased , ▁and ▁decre ased ▁slower ▁afterwards ). ▁On ▁C 1 1 0 0 0 ▁and ▁C 5 1 0 0 0 , ▁near ▁total ▁kill ▁was ▁observed ▁after ▁ 3 ▁hours , ▁then ▁total ▁kill ▁in ▁ 2 4 ▁hours ▁on ▁C 1 1 0 0 0 ▁and ▁ 4 8 ▁hours ▁on ▁C 5 1 0 0 0 . ▁On ▁C 7 0 6 0 0 , ▁near ▁total ▁kill ▁was ▁observed ▁after ▁ 5 ▁hours . ▁On ▁C 2 6 0 0 0 , ▁near ▁total ▁kill ▁was ▁achieved ▁after ▁ 4 8 ▁hours . ▁On ▁st ain less ▁steel , ▁no ▁redu ctions ▁in ▁vi able ▁organ isms ▁were ▁observed ▁after ▁ 7 2 ▁hours ▁( 3 ▁days ) ▁of ▁expos ure ▁and ▁no ▁significant ▁reduction ▁was ▁observed ▁within ▁ 1 6 8 ▁hours ▁( 1 ▁week ). ▁ ▁In fl uen za ▁A ▁ ▁In fl uen za , ▁commonly ▁known ▁as ▁flu , ▁is ▁an ▁inf ect ious ▁disease ▁from ▁a ▁vir al ▁path ogen ▁different ▁from ▁the ▁one ▁that ▁produces ▁the ▁common ▁cold . ▁Sym pt oms ▁of ▁influen za , ▁which ▁are ▁much ▁more ▁severe ▁than ▁the ▁common ▁cold , ▁include ▁fe ver , ▁s ore ▁thro at , ▁mus cle ▁p ains , ▁severe ▁head ache , ▁c ough ing , ▁weak ness ▁and ▁general ▁dis com fort . ▁In fl uen za ▁can ▁cause ▁p neum onia , ▁which ▁can ▁be ▁fatal , ▁particularly ▁in ▁young