We present data regarding VAAEs, and in particular, on
anaphylaxis, based on a large-scale study in Japanese veterinary
hospitals. Higher rates of VAAEs, anaphylaxis, and
death were observed in Japan compared to other countries.Further international studies aimed at obtaining similar
information will be necessary to elucidate the risk factors,
including breed predisposition, the quality of vaccine
products, and prior sensitization with variable allergens,
for VAAEs, with a view to developing safer vaccines. In
addition, as our study was not current, it may be also be
necessary to continually update the data of VAAEs.