After thinking for some time Alex decided to go with the [devil gene] because it gave the most benefit and its disadvantage can be managed much more easily than the other two. He did not choose [T-virus] because firstly he did not want to risk mutation or becoming a zombie and secondly his 'title' contradicts it. If he chooses it then he would have to give up his 'title' which would be more counter-productive.
Webnovel 
No, it completely makes sense he would lose the increase in the strength and agility which comes with title if he uses a t virus which is a zombie virus because he would have to disable his title if he uses it otherwise he would be immune to it
After thinking for some time Alex decided to go with the [devil gene] because it gave the most benefit and its disadvantage can be managed much more easily than the other two. He did not choose [T-virus] because firstly he did not want to risk mutation or becoming a zombie and secondly his 'title' contradicts it. If he chooses it then he would have to give up his 'title' which would be more counter-productive.
Tower of Fantasy : Rising to the Top
Movies · Daemon009