The authorities are trying to confirm how many were caused by the deadly new virus strain, which has broken out in as many as seven other countries, Cordova said.

• 猪流感是由猪流感病毒引起的一种急性呼吸道传染病，但极少传染给人。人感染猪流感病毒后，会出现高烧、精神不振、厌食、咳嗽等症状。