The other thing that was unusual about this case was that the onset of the daughter's symptoms—referred to as case A—and the mother's symptoms were at about the same time. They were only separated by one day. This suggested that they could potentially be part of the same generation of transmission and infected by someone else, not necessarily from the mother's workplace. Therefore, there were a number of things that didn't hang together about these cases, and the decision was made to move to alert level 3 in Auckland and elsewhere.