GEORGINA Mills summarises a mass mortality event (MME) of saiga antelope from haemorrhagic septicaemia (HS) over three weeks in Kazakhstan in 2015 ( VR , 27 January 2018, vol 182, p 97). Pasteurella multocida type B was identified, with no reference to somatic antigens. The 200,000 fatalities over three weeks, in isolated groups over a vast area, suggested lowered immunity in carrier animals rather than a contagious disease – in the past 38 years, three MMEs have correlated with humidity and day temperature.1 However, …