if say 2 people had the same illness but only one survived,is this because even if it is the same virus it is slightly

if say 2 people had the same illness but only one survived,is this because even if it is the same virus it is slightly different so they cant cure every person with the same disease?

Posted on March 13, 2013 by in Question. Comments Off on if say 2 people had the same illness but only one survived,is this because even if it is the same virus it is slightly