Neutralization of Vipera and Macrovipera venoms by two experimental polyvalent antisera: A study of paraspecificity

► We studied paraspecific neutralization of an array of venoms by experimental antisera. ► Vipera and Macrovipera venoms were of European and Asian origin. ► We found an important degree of intragenus paraspecific neutralization of lethality. ► The more polyvalent antiserum was generally more effective.