Henry Wesker's Virus. He discovered it in a plant known as Death's Stairway or Starieas. Those found with 'superior DNA', like Henry, are given increased muscle mass, reflexes and numerous other enhancements. Also, the host is given powers of telekinesis, although this is not present with Henry ,whom probably had a less advanced strain. Those who do not have superior DNA however, are killed by the Virus' uncontollable nature. This second form is difficult to defeat to the point that even Albert and Alex Wesker had a hard time in defeating Henry, though eventually defeated him.