For Season 4 of Modern Warfare 3, you’ll be tasked to collect DNA samples to earn weekly rewards. However, to get them, challenges must be done. Follow along to learn all the rewards and the challenges of the Altered Strain event in MW3.  MW3: All rewards for the Altered Strain event To get the rewards in the event, you must collect samples while playing the multiplayer, zombie, and warzone modes of MW3. Each has its color, and as of now, the first two strands are released. The other two samples will unlock as the event progresses through June 26.  Let’s run through what you must do for the starter strands.  Blue Strain (Ade-DGT):  390 Ade-DGT: Double XP Token 780 Ade-DGT: Double Weapon XP Token 1560 Ade-DGT: Double Battlepass XP Token 3125 Ade-DGT: Double Weapon XP Token 6250 Ade-DGT: Double Weapon XP Token 12500 Ade-DGT: Double Battlepass XP Token Orange Strain (Cyto-RCG)  780 Cyto-RCG: First Strike Mutation effect 15...