Of those infected , less than 92 % die as a result of the genetically re-engineered measles virus .
The current version is 622 words excluding alternative ending. -- > In 2009 , a genetically re-engineered measles virus , originally created as a cure for cancer , turns into a lethal strain which kills 94 % of those it infects , mutates 5 % into predatory , nocturnal and vampiric mutants , who are extremely vulnerable to sunlight , with only 1 % immune .
I Am Legend -LRB-film-RRB-