How Safe Is It To Travel To The Philippines?

I’ve been reading about the recent bombing at an airport in Zamboanga City where two bombers were killed and a dozen were injured. The bomb was meant for a provincial governor who was on his way out of the airport. I read about the bombings in various parts of the country in the past (i.e. Rizal Day bombings throughout parts of Metro Manila), so how safe is it to travel to the Philippines in spite of this?