These vaccine safety fears are unfounded

摘要

The authors are with Laboratories Hipra s.a., Spain. Sergi Bruguera is swine technical services manager for Asia, David Llopart is manager of the pig technical department and Enric Espunya is scientific director. Surprisingly, the safety aspects of the modified live virus vaccines available today against PRRS have become a priority subject over more conventional issues such as their efficacy and cost-benefit. Considerable controversy has surrounded the question of whether these vaccines are safe to use under field conditions, because of the potential ability of the vaccinal viruses to mutate and become virulent.