Sudden Increase
Surge
noun, verbal noun
きゅうぞう
急増 （きゅうぞう） Sudden Increase, Surge
急騰 （きゅうとう） Sudden Rise, Sharp Rise, Jump
高騰 （こうとう） Sudden Price Jump, Steep Price Rise
暴騰 （ぼうとう） Sudden Rise, Sharp Rise, Boom, Skyrocketing
There was a Sudden Increase in cute きゅう zombies ぞう after the cheerleading squad got infected.
If there's a Sudden Increase in cute きゅう zombies ぞう, then you've probably become a zombie.